Two planetary scientists from the UK – Prof Chandra Wickramasinghe of the Buckingham Center for Astrobiology and Dr Max Wallis of the University of Cardiff – have a possible explanation for the odd properties of Rosetta’s target comet: micro-organisms that shape cometary activity. This false-color four-image mosaic comprises images taken from a distance of 28.7 km from the center of Comet 67P/Churyumov-Gerasimenko on 3 February 2015....
