It was the fact dinosaurs small that ensured they could not survive the massive asteroid crash, University of Zurich evidence shows Dinosaurs died out after
WASHINGTON, April 17 – As astronaut Leroy Chiao watches the space shuttles he crewed make their final journeys to become museum pieces, he worries humankind
The first complete genome-sequencing of “Otzi,” Italy’s prehistoric iceman, is revealing a wealth of details about the man who roamed the Alps 5,300 years ago