A group of scientists, joined by a member of Congress, used the 100th anniversary of the Tunguska asteroid event this week to draw attention to their concern that the United States is not doing enough to defend the planet against the dangers posed by near-Earth objects. ...more

July 5, 2008

An asteroid at least 500 feet long will make a rare close pass by Earth next week, but there is no chance of an impact, scientists reported Thursday. ...more

January 25, 2008

The chance of a football field-sized asteroid plowing into Mars next month has been increased to 4 percent, scientists said Friday after analyzing archival data. ...more

December 29, 2007

They call them near-Earth objects, but they have another name: doomsday rocks. ...more

December 24, 2007