The strange metamorphosis astronomers observed in an asteroid late last year was likely caused by a collision with another space rock, according to two new studies. Full story
Comets feature prominently in at least a couple notable doomsday scenarios. In fact nature may eventually destroy us with an icy space rock, but so far none of the predictions related to comets ? or any other doomsday prognostications ? have come true.
An artist rendering of a space rock streaking toward Earth. Most experts think an impact off the Yucatan Peninsula 65 million years ago was the primary cause of the dinosaur demise. Others think volcanism and climate change may have played a role. A new and controversial idea suggests there was anot