But Toon, the co-author of a study published in the Geological Society of America Bulletin in May, reckons the dinosaurs end was even more dramatic.

• 但是图恩推测恐龙的结局可能更富有戏剧性。今年五月，图恩与人合作在《美国地质学会通报》上发表了一篇有关方面的研究论文。