Scientists say the threat of a newly discovered asteroid has risen slightly in the past few weeks, as the world's telescopes rush to track its course.
NASA is tracking a house-sized asteroid set to whiz past Earth tomorrow at a thundering 29,304 miles per hour. The space rock ...
YR4 once held a 3.1% impact chance, with the power of 500 Hiroshima bombs. Though the risk dropped, future asteroid threats ...