A long-overlooked skull from a cave in Morocco pushed back the fossil record of our species, Homo sapiens, and energized the study of modern human origins this year. Researchers determined that the skull is a startling 300,000 years old—about 100,000 years older than fossils from Ethiopia that had held the record as the oldest widely accepted remains of archaic H. sapiens.


It is one of many breakthroughs in science during 2017, several others, gene editing, neutron stars colliding, and many others, check them all out below.