Watch fireball flash across Maine sky

In this eerie, short video shot by a dashboard camera in a Portland, Maine police cruiser, a huge fireball drops from the sky, giving officers on duty more than they bargained for ...


Two comets set to whiz past Earth this week

Two comets that scientists have dubbed twins for their similar orbits are set to safely fly past Earth this week, though they will be the closest any come for the next 150 years.