Science and archaeology may have come a long way, but many things about the Earth have remained a mystery in the 21st century. One of these mysteries is a strange-looking fossil known simply as the Tully monster.
The mystery of an unclassifiable fossil that was unearthed by amateur archaeologist Francis Tully in 1955 has remained unsolved - until now.
According to The Atlantic, a team of scientists at Yale University led by graduate student Victoria McCoy have uncovered the mystery to the strange-looking fossil, concluding that it is closely related to the modern lamprey (pictured below).
McCoy, whose favourite fossil while growing up had been the Tully Monster, had been fascinated by the mysterious creature, which is believed to have roamed the sea over 300 million years ago. As a result, she took on the project to solve the mystert of this tiny, unassignable creature (it measured about 10cm, according to a report by Ars Technica).
As an unsolved mystery, the Tully Monster nickname eventually became the fossil's Latin name: Tullimonstrum gregarium.
McCoy revealed that two critical discoveries led to their new conclusion. Firstly, most of the Tully Monster fossils had notochords, or flexible vertebrae - similar to humans.
Strange creatures spotted in Singapore and around the world
The carcass of a baby goat, said to resemble a human baby, has been handed over to Malaysia's Veterinary Services Department.
The baby goat belonged to farmer Ibrahim Basir who had refused offers of money from people interested in buying the carcass.
On May 13, Malaysia's Veterinary Services Department has confirmed that there was no human DNA in a kid with human-like features in Kota Tinggi, Johor.
Its director-general Datuk Dr Kamarudin Md Isa said the goat had died in the womb and its strange features were caused by a genetic abnormality. "It is a fetal anomaly. There is no issue that the kid was born through unnatural sexual intercourse," he said.
Zhejiang fisherman caught a beaked whale that no one knew what it was until it was identified by scientists in April 2016.
The beaked whale can be identified by its lower jaw having two bumps.
The beaked whale normally lives in the deep sea, so it is rarely seen.
From a distance, the beaked whale looks like a crocodile.
Looks like a 'ghostly' croc or dolphin.
An artist's reconstruction of the Tully monster
A Chinese giant salamander in Prague Zoo, in the Czech Republic, is thought to be the longest of its species on Earth.
According to online reports, the zoo says that the creature its latest measurements found the creature to be 1.58 metres long.
The critically endangered animal is also the largest amphibian on the planet, the Associated Press (AP) reported.
A Chinese giant salamander measuring 1.4m and 52kg has recently been found in the wild in south-western China, reported Chinese media, which cited experts as saying the endangered amphibian could be more than 200 years old.
The animal was discovered in a cave in Chongqing municipality and has been transferred to an official facility for "protection" and further study, China Central Television (CCTV) said in a posting on its Weibo account on Dec 11.
Mr Eric Holland from Thurgoona, New South Wales in Australia nearly fainted when he saw a 1.5-metre long lizard perched on the wall on the side of his house.
Fishermen in Hangzhou, East China's Zhejiang province, on Sunday netted a huge black carp, measuring 175cm long and weighing nearly 90 kg - equal to a fully-grown adult male, Chinanews.com reported.
The fish is reportedly the largest and heaviest one caught in Qiandao Lake (Thousand Islet Lake), a famous scenic spot in Hangzhou.
A fish expert with the Zhejiang Museum of Natural History, who declined to be identified, said it is rare to nab such a big freshwater fish, as most of them prefer to live in the middle and lower levels of the water.
It could be sold to fishmongers for a record high price, it could be made into a museum specimen, or it could be released back into the lake.
Researchers working in Indonesia have discovered a new species of mammal called the hog-nosed rat, named for its features that scientists said have never been seen before.
The creature was found in a remote mountainous area on the island of Sulawesi in central Indonesia.
As well as its large, flat, pink nose, with forward-facing nostrils similar to that of a pig's, the creature has extremely large ears, a small mouth and long white front teeth, according to the museum.
A villager from Sichuan province, out fishing in the wild waters near Chengdu, hauled up a very strange thing on Tuesday.
It is yellow in color, weighs 6.5kg, its body is 30-40cm wide, there is a long root/tail attached to the body and it is covered in black barnacles.
The fisherman believes it may be the rare "Taisui" lingzhi mushroom, used in Chinese medicine and also in art as a symbol of longevity.
The lingzhi was eaten by Qing dynasty emperors, who believed it would prolong their life and bring great fortune to their dynasty.
If the monster from the deep does turn out to be a 6.5kg lingzhi mushroom then it could bring a handsome profit to the fisherman.
A group of fishermen might have got more than what they bargained for in their latest haul.
AsianTown has compiled a series of images showing how fishermen managed to catch a huge shark-like creature in their net.
The creature was predominantly grey in colour.
But it had red patches around its mouth and other parts of its body.
It was roughly the size of two to three men based on the photographs.
It is unclear what the creature is exactly.
Its size and features resemble that of a Basking Shark.
This poor little piglet was born this week with a severe deformity that makes it look disturbingly human.
A few disturbing photos of the creature online, sparking a debate on what could have caused the pig's mutated appearance.
Nost speculated that that the animal was suffering from a condition where the face stops forming and never fully comes together, or where the face is over-formed and squished together.
Something caught the eye of a Stomp contributor - an animal lurking in a canal next to Yio Chu Kang Seconday School - earlier Dec 14 afternoon.
It was a large snake slithering around in the water.
Said Velu: "On Sunday, 14 December at around 12.30, a snake was spotted in a canal next to Yio Chu Kang Secondary School."
"Mottled brown, it resembled a large snake like a python or constrictor."
"It was seen slithering and curling up in the murky water."
A Stomp contributor spotted a 1.5-metre long python at Marsiling a few days back.
One of her friends tried to 'get friendly' by touching it.
In the video, the Stomp contributor's friend inches close to the python, trying to grab its tail, but it lunged with a sharp hiss and scared everyone away.
According to the Stomp contributor, they were going for supper nearby at 2am when they spotted the reptile opposite Woodland Town Garden.
They then called ACRES and filmed this footage while waiting for them to arrive.
ACRES then arrived to take the python away.
ACRES officials explained that the snake was relatively "harmless".
But the snake would "give a bite when disturbed like all wild animals".
A strange sea creature that angler Ong Boon Han, 54, caught at Sentosa Island is most likely to be a basket star, say experts.
It is a rare relative of the more common starfish (sea star), but can be distinguished because of its long, thin gangly arms.
Mr Ong was surprised by his catch, which looked like it had 100 arms.
"I spotted the line going up and down, and feeling a bit peckish I got quite excited as I hauled it in. But when I pulled it out of the water I was completely flummoxed by what I was looking at," said Mr Ong.
His facebook video of the creature subsequently went viral, gaining popularity worldwide.
The basket star has been described as being "incredibly rare" and the specimen in the Raffles Museum of Biodiversity Research is the only one ever to be captured in Singapore.
A large turtle was spotted at Lower Pierce Reservoir.
The contributor's friend immediately took a picture of the animal and posted it on social media. In his caption for the photo, he said, "I was kind of shocked when it surface as its neck was so long."
Stomp contributor Sulaiman had the shock of his life when he found a hulking monitor lizard while he was jogging in Pasir Ris Park at around 12.45pm yesterday (Sep 30).
"Initially I thought the lizard was already dead since it was cramped within the confines of the drain, but when I went up and poked the lizard with a stick, the lizard reacted to it!" said Sulaiman.
After confirming that the lizard was alive, Sulaiman went off.
Sulaiman said he did not notify the authorities as he thought he lizard would be able to find its own way out. "I have never seen one so massive before and I hope the lizard made its way out safely," added Sulaiman.
Secondly, McCoy found that the Tully monster had "flaps on their sides that would have housed gills". This was initially hard to corroborate as "dead Tully Monsters typically landed on their fronts or backs - a position that obscured their gills as they turned to stone".
However, the team confirmed its findings after they found a few fossils that had been preserved in a way that allowed the gills to be visible.
The position of its eyes were found to be much like the hammerhead shark. This probably allowed the monster to see what it was eating with its mouth, which was a flexible, spade-like claw that extended out from its main body.
According to YaleNews, some key questions about Tully Monsters remain unanswered despite McCoy's research.
No one knows when the animal first appeared on Earth or when it went extinct, the university's public affairs department said on its website.
While ground-breaking, such discoveries makes us wonder what the Earth used to be like millions of years ago.