剑角龙可不是个好惹的家伙。这种两足行走的食草动物来自一个不同寻常的恐龙家族：肿头龙家族共同的特征是都长有一块又厚又圆的头盖骨。它呈半圆形，由许多小骨块组成，盖住了它的眼睛和后脖颈。这块头骨在剑角龙刚出生的时候并不是很厚，随着小龙的逐渐长大，它也越长越厚。
新的发现证实古代两足生物剑角龙可以打败现今顶级的善于头部撞击生物。
The new findings confirm that the ancient bipedal dinosaur Stegoceras could knock out any of today's top head-butters.
剑角龙是属于肿头龙类食叶属之一，这种物种生存于7千万年前的地球。
Stegoceras was a member of the leaf-eating genus Pachycephalosauria that roamed the Earth around 70 million years ago.
“那么有了这些证据那些关于剑角龙的头部不能承受头部撞击的压力的讨论似乎被驳倒了” Theodor博士说道。
"The argument that they couldn't withstand the forces of head-butting seems to have been refuted by this evidence," said Dr Theodor.
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