Scientists uncovered a 149-million-year-old bird fossil in southeastern China with unexpectedly modern traits they believe could rewrite the evolutionary history of birds. The recently discovered ...

A newly described Patagonian fossil reveals the evolutionary origins and global spread of the tiny alvarezsaur dinosaurs.

Add Yahoo as a preferred source to see more of our stories on Google. Golden autumn sunlight glints through the sedges and shrubs of the tundra in northern Alaska. Winter is approaching, and soon the ...

The identification of part of the fossilized remains of a so-called "terror bird" species in South America has given researchers new insight into the apex predators ...

In Colombia, a fossil-collecting rancher has found a giant, flightless killer from 13 million years ago — and a missing link to the region’s evolutionary history. César Perdomo, a rancher and fossil ...

Scientists with the Field Museum of Chicago have discovered that a pigeon-sized Archaeopteryx fossil in its collection displays an array of features previously unknown when it comes to the earliest ...

Navaornis hestiae (center) documents a previously unknown intermediate stage in the evolution of the central nervous system between the earliest birds (like Archaeopteryx on the left) and living birds ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Millions of years ...

The unlucky fossil bird, preserved with over 800 tiny rocks in its throat (visible as the gray mass next to the left of its neck bones). A fossil only tells part of the story. When an animal’s body is ...

The newer, more complete specimen allowed the team to finally map the globally-distributed group's strange anatomy ...

A nearly complete 90-million-year-old dinosaur fossil from Patagonia, Alnashetri, reveals how alvarezsaurs evolved and shrank ...