Hundreds of fossils uncovered in southern China's province of Yunnan reveal that at least some of the life-forms scientists had thought arose in the Cambrian period were alive and thriving millions of years earlier, in an era known as the Ediacaran period.
Four protrusions appear to be arranged in pairs, each consisting of two connected branches surrounding a central depression. We really don't understand what any of these features represent anatomically.
The Spinosaurus is a sail-backed, crocodile-snouted dinosaur that Hollywood depicted as a giant terrestrial predator capable of taking down a T. rex in Jurassic Park 3. Then they changed their mind and made it a fully aquatic diver in Jurassic World Rebirth—a rendering that was more in line with the latest paleontological knowledge. But now, deep in the Sahara Desert, a team of researchers led by Paul C. Sereno discovered new Spinosaurus fossils suggesting both scientists and filmmakers might have got it all wrong again.
Although there are many amber stones containing a single creature, there are fewer that include two or more, as is the case with a pair of mosquitoes trapped in amber 130 million years ago which tell us that, back then, males also sucked blood. Even more extraordinary is when several organisms can be seen interacting, either eating the other, acting as a parasite, or cooperating.
Marine fossils have been discovered on mountain ranges around the world, including the Himalayas, Andes and Rocky Mountains, which scientists say were once covered by ancient seas before being pushed upward as continents collided and mountains formed.
We've documented sightings of glass squids to better understand the remarkable transformations they undergo from hatchlings to adults. This new observation, captured in ultra high-resolution 4K, allowed us to zoom in on a juvenile likely no bigger than a baby carrot and reveal more details than we have been able to see before.
For example, reader David Erickson had this on his mind: If there were aliens 66 million light-years from Earth, how big a telescope would they need to see dinosaurs? Ha! I love this question. I've thought of it myself but never worked out the mathexcept to think, Probably pretty big, which turns out to dramatically underestimate the actual answer.
At first glance, it looked like Wooller and his colleagues might have found evidence that mammoths lived in central Alaska just 2,000 years ago. But ancient DNA revealed that two "mammoth" bones actually belonged to a North Pacific right whale and a minke whale-which raised a whole new set of questions. The team's hunt for Alaska's last mammoth had turned into an epic case of mistaken identity, starring two whale species and a mid-century fossil hunter.
Which animals came first? For more than a century, most evidence suggested that sponges, immobile filter-feeders that lack muscles, neurons and other specialized tissues, were the first animal lineages to emerge. Then, in 2008, a genomic study pointed to a head-scratching rival: dazzling, translucent predators called comb jellies, or ctenophores, with nerves, muscles and other sophisticated features. That single study ignited a debate that has raged for nearly 20 years, sparking fierce arguments about how complexity evolved in animals.
Wooden objects carrying the marks of carving and use could be the oldest wooden tools ever found. Researchers dated the artefacts, found in what is now Greece, to 430,000 years ago - and suggest they might have been made by early Neanderthals or their ancestors, Homo heidelbergensis. A separate study describes 480,000-old flint-knapping tools made from antler and elephant bone, from what is now the United Kingdom.
Dinosaur fever gripped the Western world during the early 1900s, fueled by the discovery of new, ever larger and more spectacular dinosaurs in Europe and especially in North America. Interest in these fossils was not merely driven by academic curiosity. Dinosaur skeletons and research had become a status symbol for museums and their financiers, whether government or private, and colonial powers turned to their areas of influence to find new remains.
Sauropodshumongous reptiles with a long neck and tail and thick, elephantlike legsplayed a starring role in the dinosaur ecosystem, according to a new study. These massive dinosaurs are the largest creatures to ever walk on land. But they also played a crucial part in the food chain, the study authors write, acting as ecosystem engineers. The research was published on Friday in the New Mexico Museum of Natural History and Science Bulletin.
The lava heron also has a much thicker bill than other closely related herons - an adaptation linked to feeding among sharp volcanic rocks and hard-shelled prey. "What we learned was something that hadn't been reported before," Mendales said. The discovery underscores how much remains unknown, even in iconic places like the Galápagos, said John Dumbacher, the Academy's curator of birds and mammals and Mendales' thesis adviser.
Specifically, I take people around downtown Seattle to explore the stone that makes up our buildings. On the corner of Second Avenue and Cherry Street is an elegant six-story structure built with two-foot-tall blocks of rough-hewn sandstone, about 44 million years old, quarried in Tenino, Washington. The building rose soon after much of downtown Seattle burned to the ground in 1889, and the jagged stone gives it a feeling of rugged permanence, certainly what the city needed after the great fire.
The animals do, however, have neuronsnerve cells that appear interconnected throughout their body. And now a new study shows that how these animals sleep is surprisingly similar to humans, suggesting that sleep may have evolved before even the most primitive brains. The findings, published on Tuesday in Nature Communications, also help answer one of science's prevailing mysteries: Why do animals sleep?
But as he swept his flashlight through the dark waters, something unexpected emerged. Inching through the beam of light, an alien creature crawled across the surface of the sand, resembling an inch-long cluster of ghostly leaves fringed with silvery filigree and capped with a pair of antennae-like stalks. It immediately caught my eye, said Gosliner, Invertebrate Zoology Curator for the California Academy of Sciences. I've been diving there for 30 years and this one immediately struck me as different.
Since the version of the article initially published, the copyright line has been amended to North Carolina Department of Natural and Cultural Resources and James Napoli, under exclusive licence to Springer Nature Limited in the HTML and PDF versions of the article.
