Well-preserved fish fossils are providing a deeper understanding of the global calamity triggered by an asteroid 12 kilometres wide that struck Mexico's Yucatan Peninsula.
The dinosaur-killing Chicxulub asteroid may have hit Earth in spring sciencenews.org - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from sciencenews.org Daily Mail and Mail on Sunday newspapers.