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.
Climate breakdown is occurring more rapidly with the heating rate almost doubling, according to research that excludes the effect of natural factors behind the latest scorching temperatures. It found global heating accelerated from a steady rate of less than 0.2C per decade between 1970 and 2015 to about 0.35C per decade over the past 10 years.
The new work was less notable for showing that we had found these bases in Ryugu than for solving a previous mystery: earlier studies had failed to detect them there, despite their presence in many other asteroid samples.
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.
Less than a year ago, United States company Colossal Biosciences announced it had "resurrected" the dire wolf, a megafauna-hunting wolf species that had been extinct for 10,000 years. Within two days of Colossal's announcement, the Interior Secretary of the US, Doug Burgum, used the idea of resurrection to justify weakening environmental protection laws: "pick your favourite species and call up Colossal". His reasoning appeared to confirm critics' fears about de-extinction technology. If we can bring any species back, why protect them to begin with?
Warwick, N., Griffiths, P., Keeble, J., Archibald, A., & Pyle, J. Atmospheric implications of increased Hydrogen use. GOV.UK https://www.gov.uk/government/publications/atmospheric-implications-of-increased-hydrogen-use (2022).
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.
During a rare break in the weather, the NYT says helicopters airlifted the researchers and their equipment 19 miles to their planned outpost site on top of the glacier. The two helicopters involved flew a dozen total loads of cargo from the icebreaker ship to the camp site, while glacial scientists and engineers erected a small tent city, complete with bathrooms, generators, and a mess hall.
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.
New research published today in Nature dates the boneschipped out from a cave called Grotte a Hominides and nearby it over decadesto about 773,000 years ago, during the era of the last common ancestor of Homo sapiens, Homo neanderthalensis and Denisovans (a group of humans that ranged across Asia and that does not have an agreed-upon species name). We can say that the shared ancestry between these three species is perhaps in Grotte a Hominides in Casablanca, says study co-author Abderrahim Mohib, a prehistorian at the National Institute of Archaeology and Heritage Sciences in Rabat, Morocco.
Roughly 14,400 years ago in what is now Russia, a wolf pup feasted on the meat of a woolly rhinoceros ( Coelodonta antiquitatis) that probably belonged to one of the last populations of the species. A genomic analysis of the woolly rhino tissue found inside the stomach of an ice age wolf ( Canis lupis) revealed that woolly rhino's extinction occurred rapidly soon after.
We have little physical evidence of these interactions turning violent, however, because burials were rare and carnivores were more likely to finish off their prey. That's why the embellished burial site of a 15-year-old from 27,000 years ago is an important window into the past: the teenager's bones indicate he was mauled by a bear. The finding represents some of the first evidence of its kind.
The oldest known pieces of sewn clothing have been discovered in a cave in Oregon, potentially rewriting all of human history. Researchers from the US uncovered pieces of animal hide stitched together from the end of the last Ice Age, approximately 12,000 years ago. That would mean that humans in North America had advanced skills, specifically for working with plants, animals, and wood, thousands of years before the Great Pyramid of Egypt was constructed.
My father was a petroleum geologist. A lot of my childhood, he was gone, away on oil rigs in the Powder River Basin and remote parts of Wyoming, living in man camps long before cellphones. We had to wait days to talk to him. When he went into the nearest town to shower, he'd find a payphone and call us. I was always breathless with news.
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.
A team of geologists has found for the first time evidence that two ancient, continent-sized, ultrahot structures hidden beneath the Earth have shaped the planet's magnetic field for the past 265 million years. These two masses, known as large low-shear-velocity provinces (LLSVPs), are part of the catalog of the planet's most enormous and enigmatic objects. Current estimates calculate that each one is comparable in size to the African continent, although they remain buried at a depth of 2,900 kilometers.
Researchers have found traces of what appears to be plant-derived poison on tiny stone arrowheads from South Africa dated to 60,000 years ago. The finding pushes back the origin of this revolutionary hunting technology by tens of thousands of years. Scientists have long been fascinated by the development of poisoned hunting weapons. For one thing, they would have seriously leveled up our ancestors' foraging game.
Eukaryotes drastically differ from archaea and bacteria (collectively, prokaryotes) by the complex organization of eukaryotic cells. The signature features of this organizational complexity include the eponymous nucleus, the endomembrane system, the elaborate cytoskeleton and the energy-converting mitochondrion, which evolved from an alphaproteobacterial endosymbiont9. Thus, the last eukaryotic common ancestor (LECA) probably already possessed mitochondria along with the other signatures of the eukaryotic cellular organization.
