For a few days at the end of December, an asteroid named 2004 MN4 looked like it might be Earth’s biggest impact threat. Based on available information about its orbit, astronomers gave odds of 1 in ...

An illustration shows an asteroid impacting Earth in circumstances similar to the asteroid strike that killed the dinosaurs and plunged the world into darkness. NASA/NCAR NASA, the European Space ...

There's a 1-in-300 chance that a recently discovered asteroid, believed to be about 1,300 feet long, could hit Earth in 2029, a NASA scientist said Thursday, but he added that the perceived risk ...

An asteroid expected to fly past Earth in 2029 will be visible to the naked eye, scientists projected Thursday. Limited time: Save 25% on NBC News subscription Get exclusive reporting, live Q&As and ...