In evolutionary biology, all life on Earth is theoretically part of a single phylogenetic tree, indicating common ancestry. This model suggests that every living organism can be traced back to a ...

A treasure trove of exceptionally preserved early animals from more than half a billion years ago has been discovered in the Grand Canyon, one of the natural world's most iconic sites. The rich fossil ...

New, miniscule fossils of the earliest-known relative of all primates, including humans, Purgatorius, have been unearthed in a more southern region of North America than ever before – and the ...