By studying a glob of 20 million-year-old amber, scientists have proven once and for all that glass does not flow.

A few minutes ago, NASA successfully destroyed two ailing spacecraft by smashing them into the Moon. You can see their crash trajectory in the video above. The two probes, Ebb and Flow, were orbiting the Moon to study its magnetic field and crust. But with fuel running low, NASA decided to fly them into a mountain…

Have you met Ebb and Flow? The twin spacecraft entered lunar orbit last month with aims of uncovering the mystery of the Moon's formation.