Recently, though, a second suggestion has surfacedthat rather than for fighting, the domeswere for show; the dinosaur equivalent of a peacock s tail.
不过最近有人提出另外一个假设:它们的大脑袋不是为了战斗,而是出于展示的目的作用相当于孔雀的尾巴。
Dr Peterson and Dr Dischler put these two theories into a head-to-head competition.
彼得森和狄斯勒博士让这两种理论来了个头对头的正面对抗。
To do so, they studied 102 pachycephalosaur skulls, of various species.
为此,他们研究了102只不同品种肿头龙的头骨。
They found that 23 of these skulls had pits in them, and that these pits were similar both toeach other and to those found in the skulls of living animals that bash each other with theirheads.
他们发现其中23只头骨上有凹坑。这些凹坑彼此类似。而且现存的用头部撞击同类的动物中,头骨上的凹坑也与之类似。
That supported the head-butting theory. The clincher, though, came when they createdcomputerised models of pachycephalosaur skulls and mapped the damage from each of theirpitted specimens on to these virtual skulls.
这支持了头部冲撞理论。不过决定性的证据来自于他们用计算机模拟的肿头龙头骨。他们将每个有坑样本的损伤部位标注在虚拟的头骨上。
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