
The dissemination of spores of micro algae has been identified as the origin of the ‘Blood Rain’ phenomena, according to a new study by Indian and Austrian experts. Since 1896, reports of intermittent red-colored rain in portions of Kerala and Sri Lanka have been coming in. The most recent one occurred in 2013 over Kerala.
You may also read: 8 Most Amazing Natural Phenomena On Earth
Even laundry left out to dry in the rain becomes red, reminding one of human blood. Many theories have been proposed to explain this strange occurrence, some of which are unreasonable, such as a divine spell or alien involvement. According to the Huffington Post in 2012, this was caused by extraterrestrial life (aliens).
The presence of spores of a European species of green microalgae, Trentepohlia annulata, caused the red color in the rain, according to a recent study published in the journal Phylogenetics and Evolutionary Biology. Trentepohlia annulata was previously only reported from Austria, a Central European country.

The study proved that blood rain is just a method used by this alga to disseminate its spores (similar to plant seeds) over a vast region at once, allowing algae to colonize a large area quickly. The study found that the DNA sequences of this species from Kerala and those from Austria were quite similar — and that they evolve slowly, implying that the alga arrived from Europe not long ago. “The investigation confirmed the possibility that the introduction occurred by clouds over the ocean — a mechanism of intercontinental species dispersal previously recorded for bacteria and fungi, but first time for algae,” stated Dr. Felix Bast of the Central University of Punjab.
Clouds dispersing over oceans are similar to intercontinental flights; spores of this alga from Europe are delivered to India via clouds that drift across the Arabian Sea.
But, if the spores made it all the way over the Arabian Sea to Kerala and Sri Lanka, why didn’t the event happen in places like Gujarat and MP?
“We don’t have any proof for this “clouds over ocean” concept, but probability is high because this is how Trentepohlia spores get transported,” Dr. Bast responded in an email to this Correspondent. Although it is unclear how these lower stratospheric clouds arrived in Kerala, the aerial route from Austria to Kerala will not travel through other states such as Gujarat or MP. It could also be related to the monsoon, as Kerala is the first state where the SW monsoon meets Sri Lanka.”
“I would imagine these spores were delivered to the clouds by wind,” Dr. Bast says of how the spores get into the clouds. We intend to collaborate with atmospheric experts to collect samples of transcontinental clouds in order to determine what types of creatures they transport. The ultimate proof will be a meta genetic analysis of cloud air using High-Efficiency Particulate Air Filters, for which I’ll soon be applying for a research grant from the Ministry of Earth Sciences.” He went on to say that the microalga is completely harmless and that the “blood” rainwater is perfectly potable, even for vegetarians. The current study was the product of an international collaboration comprising academics from India and Austria, which was funded in part by an INSPIRE Faculty Award.

Chocolate Rain in Switzerland: How a Factory Malfunction Turned Olten Into a Sweet Spectacle
In 2020, chocolate 'rained' from the sky in a town in Switzerland. This incident was caused by a ventilation system malfunction at a chocolate factory in Olten. Strong winds then carried the snow-like cocoa powder and spread it around in the immediate vicinity of the factory, covering cars and other things in chocolate.

Top 10 Mysterious And Least Explored Places On Earth
Some people believe that there is nothing unexplored remaining on earth but the world doesn't cease to surprise us with its mysteries. Today I'll tell you about the lost places of the planet and animals that live only there.

The Remarkable story of jazz bassists Henry Grimes, lost but found as janitor and reclaimed the spotlight
Henry Grimes, one of the most versatile jazz bassists, disappeared in the 1960s and was later presumed dead. However, a jazz-loving social worker found him in 2002 working as a janitor in a hotel. Grimes found his way back into the limelight when a fellow musician sent him a bass as a gift. In 2016, he received a lifetime achievement award.

Poland's Krzywy: The Mysteries of the Crooked trees
In Poland, there is a forest with 400 crooked trees that have a 90-degree bend at the base of their trunks. Despite of numerous possibilities, the real reason and how it evolved remain a mystery.

The Heartbreaking Story Of Ella Harper, The ‘Camel Girl’
Ella Harper, Professionally known as the “Camel Girl” was born with a rare orthopedic condition that cased her knee to bend backward. Due to this condition, had to walked on all four legs, which resulted in her nickname as “Camel Girl”. Tough it was hard at first, but soon she made a fortune out of it.

The Mystery of Canada's Magical Spotted Lake
Lake Khiluk, the world's most mineralized lake, and one of the most mysterious places on Earth. Each of these spots has a distinct chemical content and is said to cure various diseases.

The Mystical Money Tree of the Scottish Highlands: A 1,700-Year-Old Tradition
In the Peak District Forest of the Scottish Highlands in the UK, there is a unique tree which is laden with only money. This tree laden with money has been studded with British coins for 1700 years, there is no corner of its trunk where a British coin is not stuck.

How Were the Two Parts of the Al Naslaa Rock Formation Created?
Scientists have been puzzled by the Al Naslaa rock formation in Saudi Arabia for a long time, and there is still no explanation for why this boulder appears to have a precise incision across the middle of it.

Jim Sullivan's Mysterious Masterpiece: 'U.F.O.'
In 1969, a musician named Jim Sullivan recorded an album titled "UFO" which featured a song about him being abducted by aliens in the desert. Years later, Jim disappeared and his car was found abandoned in middle of New Mexico desert. His body has never been found.

The story of a boy who claims to be on Mars: Boriska Kipriyanovich
Boriska Kipriyanovich, who lives in Volgograd, Russia, claims he lived on Mars before being resurrected on Earth on a mission to redeem humanity. What we know about him is as follows:

The mysterious GIANT spherical stones
Mysterious spherical stones ranging in size from a few millimeters to several meters have been discovered in Crimea, United States, Russia, and New Zealand. There are many theories from various geologists, but none of them are clear.

The Mysterious Disappearance of Frederick Valentich: Australia’s Most Baffling Aviation Enigma
In 1978, Pilot Frederick Valentich and his plane disappeared in Australia. His last communication was “Melbourne that strange aircraft is hovering on top of me again… (two seconds open microphone)… it is hovering and it’s not an aircraft…”

The Miracle Baby: Nigerian Couple in the UK Welcomes a Rare Blonde, Blue-Eyed Child
A black, Nigerian couple living in the U.K. gave birth to a white, blonde, blue-eyed baby that they call the "miracle baby."

Mysterious ghost ship found with mummified captain inside [SOLVED]
German captain had been sailing the world for 20 years. It was unknown when or how he died or how long the ghost ship had been adrift

Mystery of 300-year-old mummified mermaid is being probed
There is a 300-year-old mummified mermaid with 30 centimetres tall and features a human-like head, two hands with what appear to be fingernails, and its lower body that look like a fish tail. The “mermaid mummy” is being probed by Japanese scientists in an attempt to unravel the mystery of its existence.

Lightning bolt restores man’s sight and hearing.
In 1980, an old blind and partially deaf man, Edwin Robinson, was struck by lightning. He suffered no injuries, but the impact of the lightning bold cured his vision and hearing.

The Amazing Hanging Stone in Siberia Has Defied Gravity Since the Ice Age
The unbelievable "Hanging Stone" of Siberia weighs around 300 tons and has been hanging off a 1,000-meter cliff since the Ice Age.

Qasr al-Farid, the Lonely Castle of the Nabataeans
The remote tomb of Qasr al-Farid, situated in the Saudi Arabian desert, dates back to the 1st Century CE. It was built by the Nabataean people, who also built Petra in Jordan. This site has remained largely undisturbed.

The Unsolved mystery of Bobby Dunbar's Disappearance
In 1912, a four-year-old boy named Bobby Dunbar went missing on a family trip, 8 months later he was found and reunited with his family. Nearly a century later, DNA testing of his descendants revealed that the child reunited with the Dunbar family was not Bobby, but rather a boy named Charles (Bruce) Anderson who resembled Bobby.

The Forgotten Story of Marilyn Monroe’s Stolen Dress That Returned Years Later
One of Marilyn Monroe’s most iconic gowns vanished mysteriously, disappearing into the shadows of Hollywood history. This garment, often regarded as a symbol of glamour and tragedy, slipped away for decades before resurfacing under enigmatic circumstances. Whispers of underground auctions, secret collections, and ghostly legends hint at a fascinating and almost cinematic journey for a dress that once captivated a nation. This article uncovers the intriguing saga of Marilyn Monroe’s stolen dress, tracing its path back into the public eye and exploring its lasting cultural significance.

What Is the Taos Hum? The Strange Low-Frequency Noise Heard in New Mexico
Since the early 1990s, residents of Taos, New Mexico, have reported hearing a mysterious low-frequency noise called the "Taos Hum." This strange, persistent buzzing or droning sound is only audible to a small fraction of the population and has baffled scientists and locals alike. Despite extensive investigations, the source of the Taos Hum remains unresolved, making it one of the most intriguing acoustic mysteries in the modern world.

The Mystery of Puma Punku’s Precise Stonework
Pumapunku's stone blocks were meticulously carved and polished to interlock with neighboring stones, forming a puzzle-like structure. The joints between them are incredibly precise. These characteristics show an intricate knowledge of descriptive geometry and stone cutting, indicating the use of highly advanced technology that would have seemed impossible at the time.

Inside The Mysterious Death Of The Famed Gothic Writer Edgar Allan Poe
Hours before his death Edgar Allen Poe was found on the streets of Baltimore. He was incoherent, wearing another man’s clothes, and unable to explain how he got there. The cause of his death is an unsolved mystery.

What Caused The Mysterious Patomskiy Crater in Siberia?
Discovered in 1949, the Patomskiy Crater resembles a huge convex cone with a funnel-shaped recess and a rounded hill in the middle, which looks like an eagle’s nest with an egg nestled inside it. The crater’s origin is a mystery that has baffled scientists for decades.

The mystery of India's 'lake of skeletons'
In 1942, a British forest guard in India made an alarming discovery. Some 16,000 feet above sea level, at the bottom of a small valley, was a frozen lake absolutely full of skeletons.