Rosettawatch: Onion layers prove 67P is a slow-mo comet mash-up A geological survey of comet 67P/Churyumov-Gerasimenko has revealed its two halves have layers that don't line up, meaning they came together at a crawl ¿ìè¶ÌÊÓÆµ
SpaceIs the universe infinite or just very big? The size of the observable universe is easy enough to measure, but what lies beyond the cosmic horizon? We have a long way to go to find out Features