Aug. 6, 2008
Jan. 12, 2001
By seeing almost nothing, astronomers say they've discovered something extraordinary: the event horizons of Black Holesin space.
Aug. 7, 2001
Humans can become confused and disoriented (and even a little queasy) in an alien world where up and down have no meaning.
Sept. 17, 2001
Our planet's Antarctic ozone hole is opening once again as Spring approaches in the southern hemisphere -- and scientists say it's a big one.
Sept. 5, 2001
NASA's Chandra X-ray Observatoryhas spotted a curious outburst from our galaxy's core -- a sign that the Milky Way's central black hole may be snacking on its neighbors.
April 27, 2001
Giant sunspot 9393 is making a rare second transit across the face of the Sun. Its unusual reappearance came as no surprise to scientists who tracked the behemoth by peering right through our star.
April 17, 2001
About 130 million years ago the first flowering plants suddenly appeared -- an event Charles Darwin described as an 'abominable mystery.' Now, scientists using chemical fossils are unraveling this ancient puzzle.
March 30, 2001
NATO and NASA are joining forces to host an Advanced Study Institute for students and practitioners of astrobiology.
Aug. 6, 2008
Nov. 1, 2001
Light pollution is a growing environmental problem that threatens to erase the night sky before its time.