Fossil Skeleton From Africa Predates Lucy By JOHN NOBLE WILFORD, NYTimes
Scientists said that Ardi, short for Ardipithecus ramidus, was the earliest known skeleton from the human branch of the primate family tree.
Scientists have made strides in making images of the underlying mechanics of flowing air and water.
Red Planet May Be Better Known as the Wet One By KENNETH CHANG, NYTimes
Scientists, using images taken by a camera on a Martian orbiter, discovered signs of water ice in craters far from the planet’s poles.
Interactive: Beautiful Universe Astronomy Quiz, NYTimes
Take an astronomy quiz illustrated with images from an exhibit celebrating the 400th anniversary of Galileo's telescope.