2+ hour, 30+ min ago  (724+ words) WASHINGTON - In Argentina's Patagonia region 95 million years ago, some huge dinosaurs roamed the landscape including fearsome meat-eater Giganotosaurus, at about eight tons, and immense long-necked plant-eater Argentinosaurus, perhaps 70 tons. But this was no mere land of the giants, as a…...

2+ week, 6+ day ago  (555+ words) WASHINGTON - Footprints are among the most common kind of dinosaur fossils. Sometimes scientists find a single, lonely footprint. Sometimes they come across a chaotic jumble of tracks resembling a dance floor, sort of a dinosaur discotheque. But identifying which dinosaur…...

6+ mon, 1+ week ago  (707+ words) Researchers have unearthed tooth fossils in Ethiopia dating to about 2.65 million years ago of a previously unknown species in the human evolutionary lineage, one that lived in the same time and place as the earliest-known member of the genus Homo…...

7+ mon, 2+ week ago  (572+ words) WASHINGTON -Scientists in recent years have made progress in findingancientDNA infossils, gaining insight into organisms that lived long ago. But theoldest DNAobtained so far dates back about two million years.Proteins, a cell's molecular machinery, also offer valuable information and…...