One of the ideas is scorpions came out of the water from Silurian period long time ago.

——其中一个想法是蝎子很久以前从志留纪时期就从水中出现了。

And the results suggested that flying insects could have originated 406 million years ago, in the early Devonian -- and that the common ancestor of all insects lived a whopping 440 million years ago, in the Silurian period.

结果表明，飞虫可能起源于 4.06 亿年前的泥盆纪早期——所有昆虫的共同祖先生活在 4.4 亿年前的志留纪时期。