Taxonomy term


Dinosaurs' true colors revealed

Modern birds range across the color spectrum from brilliant blue to Big Bird yellow to vibrant vermillion, so it stands to reason that feathered dinosaurs shared these colorful traits. And in fact, few paleontologists have doubted that dinosaurs were multihued beasts. But until a couple of recent finds in China, they had no real evidence. Two new studies detail the findings, which researchers say also resolve the debate over whether birds descended from dinosaurs.

30 Apr 2010

Tetrapod tracks reset timing of four-legged evolution

About 18 million years earlier than they were thought to exist, tetrapods — vertebrates with four limbs instead of fins — walked in what is today Poland. A new study published in Nature describes tracks belonging to a tetrapod in a Polish tidal flat, dating to the Middle Devonian period, about 395 million years ago. The discovery may prompt scientists to completely reassess the environment, origins and timing of early tetrapods.

07 Jan 2010

Dinosaurs' active lifestyles suggest they were warm-blooded

Whether dinosaurs were warm-blooded or cold-blooded has been a long-standing question in paleobiology. Now, new research on how two-legged dinosaurs walked and ran adds new evidence to the argument for warm-bloodedness, and suggests that even the earliest dinosaurs may have been warm-blooded.

11 Nov 2009

Are birds dinosaurs? New evidence muddies the picture

In 1861, German paleontologist Christian Erich Hermann von Mayer excavated the fine-grained limestone layers of a quarry near Solnhofen, Germany. The 150-million-year-old limestone had already proven promising for finding fossils: A year earlier, von Mayer had found the imprint of a single feather preserved in the rock. But this time, he discovered something more spectacular: an entire skeleton of what appeared to be an ancient bird.

31 Oct 2009

New cousin joins primate family tree - but it's also no missing link

Blogging on EARTH

Darwinius — the purported primate “missing link” that made headlines last spring — is back, sort of. Scientists have now found a close cousin of the primate — and they say the new fossil is no more a missing link than Darwinius was.

21 Oct 2009

Mini-T. rex fossil found in China

The Tyrannosaurus rex — arguably the most famous dinosaur of all time — was also one of the most efficient predators to ever walk on Earth. With its powerful jaws, large eyes, strong hind limbs and even tiny arms, the T. rex was uniquely designed to swiftly run down and dispatch prey. But on Wednesday, scientists announced that those characteristic T. rex features were not as unique as once thought: A new fossil find shows that 60 million years earlier, a T.

17 Sep 2009

Art and dinosaurs

Lillian the Albertosaur strolls through the halls of the American Museum of Natural History in New York City, glancing sideways at the skeletal model of a T. rex. She’s much prettier than the skeleton, from her textured brown skin, adorned with bright purple spots, to her slightly superior smirk. Neither dinosaur is actually alive: One is a fossil, and the other is a computer graphic superimposed on a photograph of the actual museum. But somehow, Lillian does liven the place up.

08 Sep 2009

Deciphering mass extinctions

What the planet’s past mass extinctions tell us about the future of life on Earth

The crash-landing of a 10-kilometer-wide asteroid 65 million years ago made for a very bad day for dinosaurs — or one very lucky day for mammals.

02 Sep 2009

Re-examining the Burgess Shale

About 505 million years ago, the continent that would become North America straddled the equator. With no terrestrial plants or animals, the land was a barren landscape. The warm, shallow sea bordering the continent, however, hosted a carbonated reef teeming with a diverse array of organisms, most of which were relatively small bottom-dwellers. Periodically, the animals would get washed over the reef and deposited at its base, where their bodies accumulated in the muddy sediments. Today, these creatures are beautifully preserved in the Burgess Shale.

24 Aug 2009

"Missing link" or major hype?

A squirrel-sized primate that lived 47 million years ago in the rainforests of Europe may be the common ancestor of monkeys, apes and humans, according to scientists who announced the discovery of the “missing link” fossil yesterday at a press conference. The well-preserved fossil has been at the center of a whirlwind PR blitz, including a History Channel documentary airing next week and an upcoming book — yet some scientists say the bones don’t live up to the hype.

20 May 2009