When Heather Renner and her colleagues began noticing thousands of common murres washing up on Alaskan beaches nearly a decade ago, they knew something was terribly wrong. It would take years of ...

Scientists have identified bones of the largest flying bird ever found -- an ancient soaring seabird with a wing span of at least 21 feet. Daniel Ksepka, curator of science at the Bruce Museum ...

Nearly 12 million years ago, the largest "terror bird" ever discovered was attacked and killed by a massive caiman, a 3D ...

Skeleton of the terror bird Titanis walleri at the Florida Museum of Natural History. (Amanda via Wikimedia Commons / Creative Commons Attribution 2.0 Generic) (CN ...

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

Laid by an elephant bird, the egg is 30.5 centimetres tall and equivalent in volume to 150 or so chicken eggs. Endemic to Madagascar, elephant birds (Aepyornis maximus) were flightless. They reached 3 ...

Prehistoric humans are under suspicion of wiping out the largest birds that ever lived after fossilised bones were discovered with telltale cut marks. According to scientists, it's evidence that ...

It would take years of study to confirm they had witnessed the largest die-off of any bird species ever recorded in the modern era, according to new research published in the journal Science on ...