Scientists taking 'active measures' for asteroid with slight chance of hitting earth.
YR4 has just above a 1% chance of crashing into Earth in 2032, which is why astronomers and space agencies are paying attention to it.
A Deadly Asteroid May Strike Earth — What To Know
A near-Earth asteroid as wide as the Statue of Liberty is tall could strike Earth on Dec.22, 2032, alerting planetary defense ...