kathrin altwegg

First detected oxygen on comets
Comet exploration robot 67P Churyumov-Gerasimenko for the first time discovered oxygen exists in the cloud of gas surrounding comets, surprising the world and putting new theories
Earth water does not come from comets
Data from the Rosetta spacecraft and the Philae robot show that comets do not bring water to the earth in the past as the scientific community previously determined.