Now, luckily, this Thrinaxodon, the size of a robin egg here: this is a skull I've discovered just before taking this picture -- there's a pen for scale; it's really tiny -- this is in the Lower Triassic, after the mass extinction has finished.
如今，幸运的是， 这种蛇颈龙，跟知更鸟蛋一样大： 在拍照之前我才发现这是头骨-- 这是用来测量的钢笔，确实很小—— 这是早三叠世时期，也就是物种大灭绝之后。