The European Space Agency's Rosetta spacecraft is about to attempt something "ridiculously difficult" - landing a probe on the surface of a speeding comet.
FULL STORY: http://science.nasa.gov/science-news/science-at-nasa/2014/03nov_rosettalanding/
SCIENCECAST VIDEO: https://www.youtube.com/watch?v=D5iyZTXiX78&feature=youtu.be
