Scientists have uncovered one of the most detailed and well-preserved nervous system fossils ever found.
Researchers believe newly uncovered fossils suggest some dinosaurs had similar courtship practices to modern birds. But can ancient footprints really reveal so much?
The big question being asked is: where does Homo naledi fit in the evolutionary tree? Assessing the similarity or dissimilarity between fossil skulls has provided a possible clue to the answer.
A dinosaur's name says something about the dinosaur itself. They are grouped together according to similarities they share, which also indicates their ancestral relationships to one another.