This little guy changes from flat sheet of paper to critter in about four minutes. Seth Kroll/Wyss Institute hide caption

itoggle caption Seth Kroll/Wyss Institute

Rosetta's OSIRIS narrow-angle camera took this close-up of the comet 67P/Churyumov-Gerasimenko on Sunday. ESA/Rosetta/MPS for OSIRIS Team hide caption

itoggle caption ESA/Rosetta/MPS for OSIRIS Team

The Rosetta spacecraft took this image of comet 67P/Churyumov-Gerasimenko on 4 August 2014 from a distance of just 145 miles. ESA/Rosetta/NAVCAM hide caption

itoggle caption ESA/Rosetta/NAVCAM