NASA warns of possible Valentine's Day asteroid strike

A 50-meter space rock could hit Earth in 2046, but the chances are ?very small,? the US space agency said

NASA is tracking a newly discovered asteroid the size of an Olympic swimming pool that could crash into Earth on Valentine's Day in 23 years' time, the space agency revealed this week. However, astronomers estimate the risk of collision is minimal.

In a tweet on Wednesday, NASA's Planet