Huge double asteroid that shot fireball at us 'could be dangerous to life on Earth'

Astronomers have traced a 2017 fireball over Japan to a massive nearby asteroid that could eventually break up and shower Earth with dangerous meteors.

It was around 1 a.m. local time on April 29, 2017, when an exceptionally bright and slow fireball lit up the skies over Kyoto, Japan. Later, a...