triassic 1 1

Tag: "triassic" at biology news

Mass extinction at the Triassic-Jurassic boundary

...Who did it? Who pulled the trigger, or rather, what pulled the trigger at the Triassic-Jurassic boundary that wiped out 20% of all marine families in Earths oceans, and, on land, most non-dinosaurian archosaurs, most therapsids, and the last of the large amphibians? Whatever it was, it shot down much of the competition so dinosaurs could later dominate the Earth.... ..."The Triassic-Jurassic...