第一批使用工具者是海蝎？

First Tool Users Were Sea Scorpions?

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这种巨型海蝎07年在德国发现，可能超过8英尺长，并且还有一个18英寸的毒针。

This giant sea scorpion, found in Germany in 2007, was probably over 8-feet high with a creepy 18-inch long claw.

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布拉迪说这种海蝎属于同类相食的物种，它们相互攻击彼此为食，这种争斗促使它们尽可能长得更大些。

Braddy said the sea scorpions also were cannibals that fought and ate one other, so it helped to be as big as they could be.

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