Paleontologists have identified the closest-known ancestor to giant T. rex among fossils originally unearthed in Mongolia in ...

Scientists announced the discovery of a new species of early tyrannosaur in a museum vault in Mongolia, an ancestor to ...

Scientists in Darwin’s time and through most of the 20th century could only work out the branches of the evolutionary tree of life by looking at the structure and appearance of animals and plants.

an evolutionary geneticist at the University of Copenhagen. That's because the oldest previously sequenced genome was about 10 times younger than the horse's. But the scientists pressed on ...

That picture (below) comes in the form of a “timetree”—a phylogenetic tree that not only shows how species are related, but also when each split occurred in evolutionary history. The idea is ...