The world we live in is an amazing and wonderful place. Over 4.5 billion years old, we really know little about the earth in the grand scheme of things. While scientists and others in similar positions have done their best to explain the world around us and how everything works, there are still a lot of unexplained natural phenomena that continue to occur.  These range from crop circles in the English countryside to the low-frequency hum that infiltrates the town of Taos, New Mexico. These strange phenomena have puzzled humans for many years and still remain mysteries, despite large-scale investigations into how they have come about. Here’s a look at some of these unexplained events and the possible reasons they occur.  12 Examples of Unexplained Natural Phenomena That Will Blow Your Mind

  1. Naga Fireballs J A Forbes, CC BY-SA 4.0, via Wikimedia Commons Also known as bung fai phaya nak or “Mekong lights,” the Naga fireballs are bright bursts of light that appear over the Mekong River. Often reported on the night of Wan Ok Phansa at the end of Buddhist Lent in late October, these fireballs raise from the river and shoot across the sky before disappearing. Only the size of a basketball, it is claimed on some occasions hundreds of these fireballs flash across the night sky.  The locals say it is the work of a giant serpent, Naga, who lives in the Mekong. Skeptics say it is people shooting flares into the sky or soldiers firing tracer rounds during the festival. Despite these believable theories, there is no evidence to suggest this is what is creating the fireballs, with locals continuing to push the narrative that Naga is responsible. 
  2. Cohoke Light Virginia Paranormal/YouTube This unexplained natural phenomena dates back to the 1950s. People began reporting seeing a light in King William County, Virginia near West Point. Known as Cohoke Light, as it is often seen near Mt. Olive Cohoke Road, the light is said to appear several hundred clicks in the distance and slowly approaches the nearby railway station, getting brighter the closer it gets.   There seem to be no scientific reason for this happening, with many people attributing it to supernatural elements, including one story about the light being from a miner’s cap who was decapitated while working in the area in the 19th century.  Thousands of people are said to have visited the area in the 60s and 70s to catch a glimpse of the light, but there haven’t been any sightings in recent years. 
  3. Spotted Lake

Located in the eastern Similkameen Valley of British Columbia, Canada, the Spotted Lake (known as Ktlil’k by the First Nations of the Okanagan Valley) is said to contain special healing powers. The Okanagan Syilx people believed that the water in the lake could heal many ailments and used it in traditional medicines.  The lake is made up of over 300 pools containing high concentrations of various minerals said to have healing properties. Interestingly, minerals in the lake were used to make ammunition for World War I.  People would travel from all around the world to bathe in the lake but it has since been taken over by the First Nations People who have fenced off the area from tourists.  4. Catatumbo Lightning

While there are several theories pertaining to the origin of Catatumbo lightning, many are contradicted by other research, with nobody 100% certain of why this phenomenon happens. Occurring over the Catatumbo River, a mass of clouds gather and unleash rain and lightning over a period of between 140 to 160 nights a year, nine hours per day. Lightening is known to flash from 16 – 40 times per minute.  The storms are thought to occur due to winds blowing across the lake and the air mass being stuck in that one location, as it is surrounded by different mountains on three sides. The continuous lighting is said to be caused by cold and warm air currents meeting, methane produced by the surrounding swamps, and a hodgepodge of different weather conditions coming together in one spot.  Nobody is quite sure why it happens, but it does make for an incredible natural occurrence that has to be seen to be believed.  5. The Taos Hum

Many of the people who live in the town of Taos, New Mexico, experience a mysterious low-frequency hum in the air. This faint noise has plagued residents since the early 1990s, with about 2% of the population complaining of hearing this humming noise as they go about their day-to-day lives.  Nobody is quite sure what causes the sound, with some believing it to be some sort of unusual acoustics created in the area while others have stated it could be a form of tinnitus. As is the case with anything like this, there are those who believe its origins are more sinister. Some say it is created by the government and connected to the High-Frequency Active Auroral Research Program (HAARP), while others put the blame on aliens, who are always getting a bad rap.  Taos isn’t the only place to experience this unexplained natural phenomena, with people from Auckland, New Zealand, and Windsor, Ontario, Canada, also hearing faint noises in certain areas of their towns.  6. Ghosts

Throughout history, ghosts have been an ever-present unexplained phenomenon. From the Bell Witch and the Cock Lane Ghost to the Blair Witch and Slimer from Ghostbusters, ghosts have been part of the world for centuries. While there is no hardcore proof that ghosts exist, thousands of people claim to have seen them, with photos and films of apparent supernatural phenomena littered across the internet.  Ghost hunters and paranormal experts strive to prove that ghosts are real and unless you have experienced some sort of supernatural occurrence, it makes it hard to believe. That said, until ghosts are definitively proven to be fake, there is always the chance they exist, making them an unexplained natural phenomena.  7. Spontaneous Human Combustion

The concept behind spontaneous human combustion is that a fire somehow ignites within a person’s body and they burst into flames. There have been several reports of this happening throughout history, but nobody is quite sure why it happens. Science investigator Joe Nickell and forensic analyst John F. Fischer are the two men who have done the most research into the subject.  They found that the majority of people who died this way were alcoholics and sitting very close to a source of ignition, like a fireplace or candle. It’s proposed that an errant flame could land on an area of clothing and a person catch on fire. They adhere to the “wick effect,” whereby the person’s clothing soaks up the melted fat and burns upright like a candle. Nasty stuff.  While there are several explanations given for how spontaneous human combustion can occur, there are still cases that are not as easily explained and remain a mystery.  8. The Dragon of Lake Baikal

Lake Baikal is the world’s oldest and deepest freshwater lake. Often mistaken for a sea, this Russian lake is close to 30 million years old and home to thousands of unique species of plants and wildlife. It plays an important part in the life of the surrounding Buryat tribes, who claim the lake is home to a giant dragon called Lusud-Khan. The Lusud-Khan is said to have inhabited the lake since its formation, with sightings dating back centuries. There is no scientific proof of the dragon’s existence, with the first exploration of the bottom of the lake only taking place in 2008, meaning there is no telling what lives below the surface of the great lake.  9. Star Jelly

It sounds like something from a science fiction movie, but star jelly is a real phenomena. Described as a “translucent gelatinous material” that falls from the sky, the goop has been around since the 14th century when it was used to treat abscesses.  Strangely, despite there being many accounts of star jelly falling from the sky and scientists researching its origins, there is no real answer for this mysterious material. Some have tried to pass it off as frog ovum but the star jelly contains no traces of frog DNA. The other theories suggest it is some form of material from dying stars, while others think it might be alien crap (we shit you not!).  10. Crop Circles

Crop circles are interesting as pranksters Doug Bower and Dave Chorley came forward in 1991 to say they were responsible for the creations that caused a media sensation in the 80s. The two demonstrated how they created these giant designs in crops using planks of wood to flatten areas of crops in fields across the U.K. They claimed to have made over 200 crop circles from 1978 – 1991. Although it might seem like there is no mystery surrounding crop circles and that they don’t qualify as an unexplained natural phenomena, there are still many that have sprung up over the past three decades without any explanation. While they are similar to the crop circles created by humans, many people still think these recent designs are related to strange weather patterns or extraterrestrial life, despite there being no hard evidence to suggest this.  11. Blood Sky

Throughout history, the blood sky has occurred sporadically several times, but in the past six years, we have been confronted by this natural phenomenon twice. The first occurred in Chalchuapa, El Salvador, in 2016, and the second event in Zhoushan, China, in 2022. On both occasions, the sky turned blood red for a short time before returning to its natural color. The experience left many residents shocked and fearing the end of the world. Looking up into the sky and seeing the color of blood doesn’t bode well, but thankfully nothing happened. Several reasons were given for the blood sky, including the side effect from a recent meteor shower in the case of Chalchupa, while in Zhoushan it was said to gave been caused by the reflection of ferry and boat lights during foggy conditions, which seems a little suspect.  12. Cities In The Sky CNN/YouTube People in Jiangxi and Foshan, China, got the shock of their lives in 2017 when they went outside and saw a floating city in the sky. As ridiculous as it seems, thousands of people witnessed this crazy phenomena, taking pictures and videos of the event. Of course, when anything like this happens the theories come thick and fast and get more and more absurd. Some said it was an alien city, others an alternative universe crashing into our own reality, and some a glitch in the matrix. There were even a few who thought it signaled the second coming of Jesus Christ. Science, on the other hand, has another explanation; Fata Morgana. This is an optical illusion created by unusual weather conditions. As Wired explains, when two layers of the atmosphere are at different temperatures, the light that hits is refracted and causes us to see things that are not there. In this case, a floating city.  While this is a plausible explanation, what you see is normally a reflection of your surroundings, and the city in the sky looks nothing like the earth it is meant to be reflecting. 

See more about - 10 Ancient Mysteries That Have Baffled People For Centuries

The world we live in is an amazing and wonderful place. Over 4.5 billion years old, we really know little about the earth in the grand scheme of things. While scientists and others in similar positions have done their best to explain the world around us and how everything works, there are still a lot of unexplained natural phenomena that continue to occur.  These range from crop circles in the English countryside to the low-frequency hum that infiltrates the town of Taos, New Mexico. These strange phenomena have puzzled humans for many years and still remain mysteries, despite large-scale investigations into how they have come about. Here’s a look at some of these unexplained events and the possible reasons they occur.  12 Examples of Unexplained Natural Phenomena That Will Blow Your Mind

  1. Naga Fireballs J A Forbes, CC BY-SA 4.0, via Wikimedia Commons Also known as bung fai phaya nak or “Mekong lights,” the Naga fireballs are bright bursts of light that appear over the Mekong River. Often reported on the night of Wan Ok Phansa at the end of Buddhist Lent in late October, these fireballs raise from the river and shoot across the sky before disappearing. Only the size of a basketball, it is claimed on some occasions hundreds of these fireballs flash across the night sky.  The locals say it is the work of a giant serpent, Naga, who lives in the Mekong. Skeptics say it is people shooting flares into the sky or soldiers firing tracer rounds during the festival. Despite these believable theories, there is no evidence to suggest this is what is creating the fireballs, with locals continuing to push the narrative that Naga is responsible. 
  2. Cohoke Light Virginia Paranormal/YouTube This unexplained natural phenomena dates back to the 1950s. People began reporting seeing a light in King William County, Virginia near West Point. Known as Cohoke Light, as it is often seen near Mt. Olive Cohoke Road, the light is said to appear several hundred clicks in the distance and slowly approaches the nearby railway station, getting brighter the closer it gets.   There seem to be no scientific reason for this happening, with many people attributing it to supernatural elements, including one story about the light being from a miner’s cap who was decapitated while working in the area in the 19th century.  Thousands of people are said to have visited the area in the 60s and 70s to catch a glimpse of the light, but there haven’t been any sightings in recent years. 
  3. Spotted Lake

Located in the eastern Similkameen Valley of British Columbia, Canada, the Spotted Lake (known as Ktlil’k by the First Nations of the Okanagan Valley) is said to contain special healing powers. The Okanagan Syilx people believed that the water in the lake could heal many ailments and used it in traditional medicines.  The lake is made up of over 300 pools containing high concentrations of various minerals said to have healing properties. Interestingly, minerals in the lake were used to make ammunition for World War I.  People would travel from all around the world to bathe in the lake but it has since been taken over by the First Nations People who have fenced off the area from tourists.  4. Catatumbo Lightning

While there are several theories pertaining to the origin of Catatumbo lightning, many are contradicted by other research, with nobody 100% certain of why this phenomenon happens. Occurring over the Catatumbo River, a mass of clouds gather and unleash rain and lightning over a period of between 140 to 160 nights a year, nine hours per day. Lightening is known to flash from 16 – 40 times per minute.  The storms are thought to occur due to winds blowing across the lake and the air mass being stuck in that one location, as it is surrounded by different mountains on three sides. The continuous lighting is said to be caused by cold and warm air currents meeting, methane produced by the surrounding swamps, and a hodgepodge of different weather conditions coming together in one spot.  Nobody is quite sure why it happens, but it does make for an incredible natural occurrence that has to be seen to be believed.  5. The Taos Hum

Many of the people who live in the town of Taos, New Mexico, experience a mysterious low-frequency hum in the air. This faint noise has plagued residents since the early 1990s, with about 2% of the population complaining of hearing this humming noise as they go about their day-to-day lives.  Nobody is quite sure what causes the sound, with some believing it to be some sort of unusual acoustics created in the area while others have stated it could be a form of tinnitus. As is the case with anything like this, there are those who believe its origins are more sinister. Some say it is created by the government and connected to the High-Frequency Active Auroral Research Program (HAARP), while others put the blame on aliens, who are always getting a bad rap.  Taos isn’t the only place to experience this unexplained natural phenomena, with people from Auckland, New Zealand, and Windsor, Ontario, Canada, also hearing faint noises in certain areas of their towns.  6. Ghosts

Throughout history, ghosts have been an ever-present unexplained phenomenon. From the Bell Witch and the Cock Lane Ghost to the Blair Witch and Slimer from Ghostbusters, ghosts have been part of the world for centuries. While there is no hardcore proof that ghosts exist, thousands of people claim to have seen them, with photos and films of apparent supernatural phenomena littered across the internet.  Ghost hunters and paranormal experts strive to prove that ghosts are real and unless you have experienced some sort of supernatural occurrence, it makes it hard to believe. That said, until ghosts are definitively proven to be fake, there is always the chance they exist, making them an unexplained natural phenomena.  7. Spontaneous Human Combustion

The concept behind spontaneous human combustion is that a fire somehow ignites within a person’s body and they burst into flames. There have been several reports of this happening throughout history, but nobody is quite sure why it happens. Science investigator Joe Nickell and forensic analyst John F. Fischer are the two men who have done the most research into the subject.  They found that the majority of people who died this way were alcoholics and sitting very close to a source of ignition, like a fireplace or candle. It’s proposed that an errant flame could land on an area of clothing and a person catch on fire. They adhere to the “wick effect,” whereby the person’s clothing soaks up the melted fat and burns upright like a candle. Nasty stuff.  While there are several explanations given for how spontaneous human combustion can occur, there are still cases that are not as easily explained and remain a mystery.  8. The Dragon of Lake Baikal

Lake Baikal is the world’s oldest and deepest freshwater lake. Often mistaken for a sea, this Russian lake is close to 30 million years old and home to thousands of unique species of plants and wildlife. It plays an important part in the life of the surrounding Buryat tribes, who claim the lake is home to a giant dragon called Lusud-Khan. The Lusud-Khan is said to have inhabited the lake since its formation, with sightings dating back centuries. There is no scientific proof of the dragon’s existence, with the first exploration of the bottom of the lake only taking place in 2008, meaning there is no telling what lives below the surface of the great lake.  9. Star Jelly

It sounds like something from a science fiction movie, but star jelly is a real phenomena. Described as a “translucent gelatinous material” that falls from the sky, the goop has been around since the 14th century when it was used to treat abscesses.  Strangely, despite there being many accounts of star jelly falling from the sky and scientists researching its origins, there is no real answer for this mysterious material. Some have tried to pass it off as frog ovum but the star jelly contains no traces of frog DNA. The other theories suggest it is some form of material from dying stars, while others think it might be alien crap (we shit you not!).  10. Crop Circles

Crop circles are interesting as pranksters Doug Bower and Dave Chorley came forward in 1991 to say they were responsible for the creations that caused a media sensation in the 80s. The two demonstrated how they created these giant designs in crops using planks of wood to flatten areas of crops in fields across the U.K. They claimed to have made over 200 crop circles from 1978 – 1991. Although it might seem like there is no mystery surrounding crop circles and that they don’t qualify as an unexplained natural phenomena, there are still many that have sprung up over the past three decades without any explanation. While they are similar to the crop circles created by humans, many people still think these recent designs are related to strange weather patterns or extraterrestrial life, despite there being no hard evidence to suggest this.  11. Blood Sky

Throughout history, the blood sky has occurred sporadically several times, but in the past six years, we have been confronted by this natural phenomenon twice. The first occurred in Chalchuapa, El Salvador, in 2016, and the second event in Zhoushan, China, in 2022. On both occasions, the sky turned blood red for a short time before returning to its natural color. The experience left many residents shocked and fearing the end of the world. Looking up into the sky and seeing the color of blood doesn’t bode well, but thankfully nothing happened. Several reasons were given for the blood sky, including the side effect from a recent meteor shower in the case of Chalchupa, while in Zhoushan it was said to gave been caused by the reflection of ferry and boat lights during foggy conditions, which seems a little suspect.  12. Cities In The Sky CNN/YouTube People in Jiangxi and Foshan, China, got the shock of their lives in 2017 when they went outside and saw a floating city in the sky. As ridiculous as it seems, thousands of people witnessed this crazy phenomena, taking pictures and videos of the event. Of course, when anything like this happens the theories come thick and fast and get more and more absurd. Some said it was an alien city, others an alternative universe crashing into our own reality, and some a glitch in the matrix. There were even a few who thought it signaled the second coming of Jesus Christ. Science, on the other hand, has another explanation; Fata Morgana. This is an optical illusion created by unusual weather conditions. As Wired explains, when two layers of the atmosphere are at different temperatures, the light that hits is refracted and causes us to see things that are not there. In this case, a floating city.  While this is a plausible explanation, what you see is normally a reflection of your surroundings, and the city in the sky looks nothing like the earth it is meant to be reflecting. 

See more about - 10 Ancient Mysteries That Have Baffled People For Centuries

The world we live in is an amazing and wonderful place. Over 4.5 billion years old, we really know little about the earth in the grand scheme of things. While scientists and others in similar positions have done their best to explain the world around us and how everything works, there are still a lot of unexplained natural phenomena that continue to occur. 

These range from crop circles in the English countryside to the low-frequency hum that infiltrates the town of Taos, New Mexico. These strange phenomena have puzzled humans for many years and still remain mysteries, despite large-scale investigations into how they have come about. Here’s a look at some of these unexplained events and the possible reasons they occur. 

12 Examples of Unexplained Natural Phenomena That Will Blow Your Mind

1. Naga Fireballs

J A Forbes, CC BY-SA 4.0, via Wikimedia Commons

Also known as bung fai phaya nak or “Mekong lights,” the Naga fireballs are bright bursts of light that appear over the Mekong River. Often reported on the night of Wan Ok Phansa at the end of Buddhist Lent in late October, these fireballs raise from the river and shoot across the sky before disappearing. Only the size of a basketball, it is claimed on some occasions hundreds of these fireballs flash across the night sky. 

The locals say it is the work of a giant serpent, Naga, who lives in the Mekong. Skeptics say it is people shooting flares into the sky or soldiers firing tracer rounds during the festival. Despite these believable theories, there is no evidence to suggest this is what is creating the fireballs, with locals continuing to push the narrative that Naga is responsible. 

2. Cohoke Light

Virginia Paranormal/YouTube

This unexplained natural phenomena dates back to the 1950s. People began reporting seeing a light in King William County, Virginia near West Point. Known as Cohoke Light, as it is often seen near Mt. Olive Cohoke Road, the light is said to appear several hundred clicks in the distance and slowly approaches the nearby railway station, getting brighter the closer it gets. 

 There seem to be no scientific reason for this happening, with many people attributing it to supernatural elements, including one story about the light being from a miner’s cap who was decapitated while working in the area in the 19th century. 

Thousands of people are said to have visited the area in the 60s and 70s to catch a glimpse of the light, but there haven’t been any sightings in recent years. 

3. Spotted Lake

Located in the eastern Similkameen Valley of British Columbia, Canada, the Spotted Lake (known as Ktlil’k by the First Nations of the Okanagan Valley) is said to contain special healing powers. The Okanagan Syilx people believed that the water in the lake could heal many ailments and used it in traditional medicines. 

The lake is made up of over 300 pools containing high concentrations of various minerals said to have healing properties. Interestingly, minerals in the lake were used to make ammunition for World War I. 

People would travel from all around the world to bathe in the lake but it has since been taken over by the First Nations People who have fenced off the area from tourists. 

4. Catatumbo Lightning

While there are several theories pertaining to the origin of Catatumbo lightning, many are contradicted by other research, with nobody 100% certain of why this phenomenon happens. Occurring over the Catatumbo River, a mass of clouds gather and unleash rain and lightning over a period of between 140 to 160 nights a year, nine hours per day. Lightening is known to flash from 16 – 40 times per minute. 

The storms are thought to occur due to winds blowing across the lake and the air mass being stuck in that one location, as it is surrounded by different mountains on three sides. The continuous lighting is said to be caused by cold and warm air currents meeting, methane produced by the surrounding swamps, and a hodgepodge of different weather conditions coming together in one spot. 

Nobody is quite sure why it happens, but it does make for an incredible natural occurrence that has to be seen to be believed. 

5. The Taos Hum

Many of the people who live in the town of Taos, New Mexico, experience a mysterious low-frequency hum in the air. This faint noise has plagued residents since the early 1990s, with about 2% of the population complaining of hearing this humming noise as they go about their day-to-day lives. 

Nobody is quite sure what causes the sound, with some believing it to be some sort of unusual acoustics created in the area while others have stated it could be a form of tinnitus. As is the case with anything like this, there are those who believe its origins are more sinister. Some say it is created by the government and connected to the High-Frequency Active Auroral Research Program (HAARP), while others put the blame on aliens, who are always getting a bad rap. 

Taos isn’t the only place to experience this unexplained natural phenomena, with people from Auckland, New Zealand, and Windsor, Ontario, Canada, also hearing faint noises in certain areas of their towns. 

6. Ghosts

Throughout history, ghosts have been an ever-present unexplained phenomenon. From the Bell Witch and the Cock Lane Ghost to the Blair Witch and Slimer from Ghostbusters, ghosts have been part of the world for centuries. While there is no hardcore proof that ghosts exist, thousands of people claim to have seen them, with photos and films of apparent supernatural phenomena littered across the internet. 

Ghost hunters and paranormal experts strive to prove that ghosts are real and unless you have experienced some sort of supernatural occurrence, it makes it hard to believe. That said, until ghosts are definitively proven to be fake, there is always the chance they exist, making them an unexplained natural phenomena. 

7. Spontaneous Human Combustion

The concept behind spontaneous human combustion is that a fire somehow ignites within a person’s body and they burst into flames. There have been several reports of this happening throughout history, but nobody is quite sure why it happens. Science investigator Joe Nickell and forensic analyst John F. Fischer are the two men who have done the most research into the subject. 

They found that the majority of people who died this way were alcoholics and sitting very close to a source of ignition, like a fireplace or candle. It’s proposed that an errant flame could land on an area of clothing and a person catch on fire. They adhere to the “wick effect,” whereby the person’s clothing soaks up the melted fat and burns upright like a candle. Nasty stuff. 

While there are several explanations given for how spontaneous human combustion can occur, there are still cases that are not as easily explained and remain a mystery. 

8. The Dragon of Lake Baikal

Lake Baikal is the world’s oldest and deepest freshwater lake. Often mistaken for a sea, this Russian lake is close to 30 million years old and home to thousands of unique species of plants and wildlife. It plays an important part in the life of the surrounding Buryat tribes, who claim the lake is home to a giant dragon called Lusud-Khan.

The Lusud-Khan is said to have inhabited the lake since its formation, with sightings dating back centuries. There is no scientific proof of the dragon’s existence, with the first exploration of the bottom of the lake only taking place in 2008, meaning there is no telling what lives below the surface of the great lake. 

9. Star Jelly

It sounds like something from a science fiction movie, but star jelly is a real phenomena. Described as a “translucent gelatinous material” that falls from the sky, the goop has been around since the 14th century when it was used to treat abscesses. 

Strangely, despite there being many accounts of star jelly falling from the sky and scientists researching its origins, there is no real answer for this mysterious material. Some have tried to pass it off as frog ovum but the star jelly contains no traces of frog DNA. The other theories suggest it is some form of material from dying stars, while others think it might be alien crap (we shit you not!). 

10. Crop Circles

Crop circles are interesting as pranksters Doug Bower and Dave Chorley came forward in 1991 to say they were responsible for the creations that caused a media sensation in the 80s. The two demonstrated how they created these giant designs in crops using planks of wood to flatten areas of crops in fields across the U.K. They claimed to have made over 200 crop circles from 1978 – 1991.

Although it might seem like there is no mystery surrounding crop circles and that they don’t qualify as an unexplained natural phenomena, there are still many that have sprung up over the past three decades without any explanation. While they are similar to the crop circles created by humans, many people still think these recent designs are related to strange weather patterns or extraterrestrial life, despite there being no hard evidence to suggest this. 

11. Blood Sky

Throughout history, the blood sky has occurred sporadically several times, but in the past six years, we have been confronted by this natural phenomenon twice. The first occurred in Chalchuapa, El Salvador, in 2016, and the second event in Zhoushan, China, in 2022. On both occasions, the sky turned blood red for a short time before returning to its natural color.

The experience left many residents shocked and fearing the end of the world. Looking up into the sky and seeing the color of blood doesn’t bode well, but thankfully nothing happened. Several reasons were given for the blood sky, including the side effect from a recent meteor shower in the case of Chalchupa, while in Zhoushan it was said to gave been caused by the reflection of ferry and boat lights during foggy conditions, which seems a little suspect. 

12. Cities In The Sky

CNN/YouTube

People in Jiangxi and Foshan, China, got the shock of their lives in 2017 when they went outside and saw a floating city in the sky. As ridiculous as it seems, thousands of people witnessed this crazy phenomena, taking pictures and videos of the event. Of course, when anything like this happens the theories come thick and fast and get more and more absurd. Some said it was an alien city, others an alternative universe crashing into our own reality, and some a glitch in the matrix. There were even a few who thought it signaled the second coming of Jesus Christ.

Science, on the other hand, has another explanation; Fata Morgana. This is an optical illusion created by unusual weather conditions. As Wired explains, when two layers of the atmosphere are at different temperatures, the light that hits is refracted and causes us to see things that are not there. In this case, a floating city. 

While this is a plausible explanation, what you see is normally a reflection of your surroundings, and the city in the sky looks nothing like the earth it is meant to be reflecting. 

See more about - 10 Ancient Mysteries That Have Baffled People For Centuries

See more about - 10 Ancient Mysteries That Have Baffled People For Centuries