Rosetta Saw Collapsing Cliffs and Other Changes on 67P During its Mission

It seems that comet 67P/Churyumov-Gerasimenko is not the stoic, unchanging Solar System traveller that it might seem to be. Scientists working through the vast warehouse of images from the Rosetta spacecraft have discovered there’s lots going on on 67P. Among the activity are collapsing cliffs and bouncing boulders. Rosetta spent almost two years at 67P, …