RIP NASA's Messenger Mercury probe: See ya later, alien crater

Craft slams into planet at 8,000 MPH, but we won't see the hole for a while, crocodile

Pic  After 11 years of operation, NASA's MErcury Surface, Space ENvironment, GEochemistry, and Ranging (Messenger) spacecraft has smashed into the planet Mercury at 3.9km per second (8,724 MPH) – creating the first human-made crater on the alien world.…