The Rosetta mission team has received a wealth of information about Comet 67P/Churyumov-Gerasimenko, but a recent discovery came as quite a surprise.

The Rosetta mission team has received a wealth of information about Comet 67P/Churyumov-Gerasimenko, but a recent discovery came as quite a surprise. 
There is oxygen in the cloud that surrounds the speeding mass of rock and ice.
Scientists first made the observation months ago, but have kept the discovery under wraps until just recently, publishing their findings in the new issue of