The European Space Agency has released an amazing set of images that show Philae bouncing across the surface of comet 67P. During its initial descent, Rosetta's Philae lander failed to fire its landing harpoons -- and thus proceeded to rebound off the hard comet, travelling hundreds of meters into the air before coming back down for a second landing about two hours later. We still don't know where Philae finally landed, but the photos released by the ESA are rather extraordinary.