It's vaguely disturbing but also remarkably cool to realize that the universe is not a fixed mechanical clockwork, but that things in it change over time. Such as … craters on the moon …
Reshared post from +Philip Plait
Congratulations! It's a bouncing baby crater!
Say hello the Moon's youngest known natural crater: this unnamed impact site is just 10 meters across, seen here in a picture taken in 2009 by the Lunar Reconnaissance Orbiter. The thing is, the crater wasn't in a picture taken of the same area during Apollo 15 in 1971… meaning this crater is no more than 41 years old!
Read all about it:
http://www.slate.com/blogs/bad_astronomy/2012/11/26/fresh_lunar_impact_crater_revealed_in_new_photo_by_nasa_probe.html
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