Two Penn State University professors have mapped much of the genetic code of the woolly mammoth, a possible first step toward re-creating the extinct beast in the next 10 to 20 years. (Today)

CAPE CANAVERAL, Fla. -- A spacewalking astronaut accidentally let go of her tool bag yesterday after a grease gun inside it exploded, and helplessly watched as the tote and everything inside floated away. (Yesterday)

You may have noticed that there are fewer bright stars and distinctive constellations in the autumn sky, and that the Big Dipper appears to be missing from the northern (11/17/2008)

CAPE CANAVERAL, Fla. -- Space shuttle Endeavour and a crew of seven yesterday blasted into the night sky, bound for the international space station and the most extreme home makeover project ever attempted by astronauts. (11/15/2008)

Two teams of astronomers made stunning claims yesterday that they have separately obtained images of planets orbiting two different stars in our galaxy. (11/14/2008)