Buzz
In recent years, an influx of exceptional fossils has been discovered. It's not just the largest dinosaurs that provide the most value to science. More often, it’s the smaller remains that unlock clues about ancient behaviors, extinct diets, lost ancestors, and provide solutions to complex scientific riddles.
New discoveries can also bring forth captivating mysteries, such as the untold stories of unknown human species and creatures. Some finds are nothing short of dramatic, revealing life forms that perished mere moments after the catastrophic asteroid impact that wiped out the dinosaurs.
10. Ancestor of the Comb Jelly
Certain researchers have a special fondness for jellies, particularly the predatory, gelatinous variety—not the wobbly dessert. Recently, a scientist from the UK traveled to China and was shown a specific fossil. Upon seeing it, he became quite enthusiastic about the creature's tentacles. The fossil, later named Daihua sanqiong, featured 18 whip-like tentacles around its mouth.
Each tentacle was covered in sturdy ciliary hairs, a feature unique to comb jellies. This living species still exists today, utilizing 'combs' of cilia to move through the ocean's waters. The comb jelly was somewhat of an evolutionary enigma, with no clear lineage in the tree of life.
Yet, the 518-million-year-old fossil shared enough similarities with comb jellies and other ancient species to allow researchers to cautiously reconstruct the early evolutionary path of comb jellies. It even suggested possible relatives—corals and anemones—for this long-lost creature.
9. Bandicoots Were Agile and Swift
Pig-footed bandicoots vanished from existence in the 1950s. Like most marsupials, they were uniquely different in their own way. These bandicoots seemed to be a blend of traits from a deer, a kangaroo, and an opossum. Weighing roughly the same as a basketball, they were among the smallest grazers to have ever existed.
With no living specimens available, researchers turned to the aboriginal community for insight into the creature’s behavior. Interviews conducted in the 1980s uncovered a surprising fact—the awkward animal was capable of galloping at impressive speeds.
What made this revelation so unexpected was the bandicoot’s peculiar foot structure. Each of its front legs featured two functional toes, while each hind leg had only one. This seemed like an unstable design. Yet, according to eyewitnesses, the herbivores could dart away like the Road Runner when startled.
In 2019, a DNA analysis was performed on the last 29 known skeletons of the species in museums. The results revealed that what scientists had believed to be a single species, Chaeropus ecaudatus, was actually two distinct species. The newly identified species was named Chaeropus yirratji in honor of a local aboriginal term for the animal.
8. Worm City
In 2018, rocks from Canada's Mackenzie Mountains were examined. The rocks weren't expected to be of much interest beyond another study, but during preparation, the grinding and cutting revealed unexpected colorations that sparked a closer look—and this led to a major shift in scientific thinking.
To understand the source of these strange colors, the samples were scanned and enhanced digitally. Almost immediately, a network of tunnels began to appear. Previously undetected, these tunnels were created by a thriving population of worms. While this might seem mundane, it revealed life where it was once thought impossible.
The rocks, dating back 500 million years, originated when the area was still a seafloor. Many experts believed it to be a lifeless zone due to a lack of oxygen. However, some of the rocks were so heavily tunneled they resembled the bustling highways of a city, showing that this so-called dead zone actually supported far more life—and oxygen—than previously imagined.
7. Step Closer to Ancestor X
Ancestor X is the enigmatic subject of an ongoing scientific debate. It pertains to the early evolutionary tree of vertebrates, which includes humans. Interestingly, Ancestor X isn't a primate but a fish. This aquatic ancestor was inferred when researchers studied some of the oldest living vertebrates today.
Many believed that the boneless hagfish and lampreys occupied the lowest branches of the evolutionary tree, implying that Ancestor X shared similarities with these eel-like creatures. Fossil evidence seemed to support this theory, but genetic tests told a different story.
Genetic research revealed that hagfish and lampreys diverged from a common ancestor much earlier than initially thought. The debate took a turn in favor of the genetic findings when a fossil was unearthed in Lebanon in 2011—a hagfish from around 100 million years ago.
Given that hagfish lack bones, discovering a fossil of one was described as 'like finding a sneeze in the fossil record,' according to one scientist. This rare find showed features suggesting that Ancestor X was not a soft-bodied eel but likely resembled a fish more closely.
6. Distinctive Footprints
Around 1 percent of fossilized tracks revealed that dinosaurs had skin on the soles of their feet. As skin forms individual patterns, these foot impressions could have been distinct 'fingerprints' unique to each dinosaur. However, the fossils examined showed only faint traces of skin.
Scientists obsessed with fingerprints longed for just one preserved fossil fingerprint, and eventually, they found five. Few have heard of Minisauripus, the tiniest theropod. The larger theropods, which were the bipedal carnivores often depicted chasing humans in films, are better known, with Tyrannosaurus rex being the most famous.
While Minisauripus may not have the dramatic allure of its larger relatives, one of these creatures left behind footprints unlike any other. About 120 million years ago, it made tracks in what is now Korea.
Uncovered in 2019, the remarkably preserved feet were just 2.5 centimeters (1 inch) in length. These paws were completely covered in unique 'fingerprints.' The pattern was unexpected. Tiny scales interwoven like fabric, creating a design that closely resembled those found on ancient Chinese bird fossils. This was something the team had anticipated from a much larger theropod.
5. Ancient Diet and Digestion
When paleontologists seek to determine the diet of extinct species, their options are limited. The shape of teeth and chemical deposits in bones can provide clues, but to get a clearer picture, researchers prefer discovering fossilized stomach contents. Unfortunately, soft tissues like the stomach and undigested meals do not preserve well.
In 1965, a pterosaur fossil (dating back 161 to 146 million years) was found in Southern Germany. At first, the importance of the discovery was not recognized. However, in 2015, scientists took a closer look at the flying reptile in its home museum in Canada. Fortunately, the fossil had been well-preserved.
Among the well-preserved features, there were hints about its diet. Inside the creature’s gut was what appeared to be a fish skeleton. The most intriguing find, however, was a lump near the base of the pterodactyl’s spine. This was likely a coprolite, or fossilized excrement.
Coprolites are already rare, but discovering one inside a pterodactyl would be a groundbreaking first. The analysis of this potential fossilized waste revealed details about the reptile's diet. Among the remains were spiny fragments resembling a marine invertebrate, possibly a sponge or starfish-like creature.
4. Whale Ancestor with Hooves
Whales originally evolved from land-dwelling mammals before fully adapting to life in the sea. While there are still gaps in this evolutionary story, a significant discovery in 2011 provided a key piece. A 42.6-million-year-old whale fossil was found in Peru, and it revealed that this early whale had four legs.
Each foot had a hoof and was webbed like that of an otter, creating a curious combination that indicated the animal was adept both on land and in the water. Fossils of other whales from this period were too incomplete to provide any insight into how whales transitioned from land to marine life.
The flipper-hoofed creature, officially known as Peregocetus pacificus, was a crucial discovery. It confirmed that early whales sometimes lived on land, likely to mate and give birth, but were also capable of remaining in the water for extended periods. This revealed an extreme semiaquatic lifestyle for an evolutionary transitional species.
This 4-meter-long (13 ft) animal also provided key information about the spread of whales to the Americas. The fossil from Peru indicated that these ancient whales likely crossed the South Atlantic, which was only half its current size, originating from an area near India.
3. The Day The Dinosaurs Perished
The K-Pg boundary serves as a somber marker of extinction. Discovered in the 1970s, this layer lies between the Cretaceous and Paleogene periods and is rich in iridium, a telltale sign of a massive asteroid impact that struck near Mexico 66 million years ago.
The asteroid left behind a 145-kilometer (90-mile) wide crater and caused the extinction of three out of every four species, including the dinosaurs. Despite this catastrophic event, known as the K-Pg extinction, no fossils directly linked to the disaster were found immediately after it occurred.
In 2019, ancient fish fossils were discovered at Hell Creek, North Dakota, representing the first major species found at the K-Pg boundary. Even more astonishing, the fish had glass spheres lodged in their gills. These glass formations were a result of the impact, which caused the glass to rain down on Hell Creek moments after the asteroid struck, before the fish were encased in mud along with other animals, plants, and insects.
The discovery of glass-covered fish confirmed that these creatures perished quickly due to the immediate aftermath of the impact. Examining the Hell Creek fossils offers a glimpse into the moment when the dinosaurs met their end.
2. A New Human
Modern humans are the only surviving species of the hominid 'family tree.' Our distant relatives, such as the Neanderthals, Australopithecus, and Homo erectus, have all vanished. The discovery of a new human species is an exceedingly rare event.
In 2007, a 67,000-year-old human foot bone was found in the Philippines, marking the earliest human fragment discovered in the region. Then, in 2019, 12 additional bones were uncovered nearby, revealing the existence of a previously unknown miniature human species.
This region had already made headlines in 2004 with the discovery of Homo floresiensis, a tiny hominid known as the 'hobbit,' in Indonesia. The newly discovered species, named Homo luzonensis, displayed traits found in H. sapiens, H. erectus, and Australopithecus.
The combination of features confirmed that it was a distinct species, yet the absence of usable DNA left many evolutionary connections unclear. This discovery also challenged the long-held notion that H. erectus was the first to migrate out of Africa, followed by H. sapiens around 40,000 to 50,000 years ago.
This small human species was outside Africa nearly 10,000 years earlier than expected. Remarkably, their Australopithecus traits are even more ancient, with some Australopithecus fossils being over three million years old. While no Australopithecus remains have been found outside Africa, these ancient features raise intriguing questions.
1. Cache Of 50-Plus New Species
In 2019, while exploring China’s Danshui River, a team of scientists struck gold. They stumbled upon a massive collection of ancient remains, which they carefully examined and debated.
The team unearthed the fossilized remains of 101 animals. Remarkably, more than half of them were entirely new species. Ironically, the breakthrough came just as the researchers sat down to enjoy their lunch.
While enjoying their meal, someone spotted clear indications of ancient mudflows. Known for their ability to preserve fossils, this batch from the Danshui River was astonishing. The remains were so well-preserved that soft tissues and creatures that usually don’t fossilize appeared almost as though they had just been pressed. Among the perfectly preserved specimens were jellyfish, eyes, gills, digestive systems, soft-bodied worms, and sea anemones, just to name a few.
The fossils were dated to the Cambrian Period (490 million to 530 million years ago), a time of rapid animal diversification. This newly discovered cache of species offers a remarkable opportunity to gain deeper insights into this extraordinary era of life’s evolution.
