During the Cambrian period, 500 million years ago, worm-like creatures were evolving into fish-like creatures.

在5亿年前的寒武纪，似蠕虫生物逐渐演化成似鱼生物。

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The basement strata and the migmatite, however, were formed much later, about Cambrian period and early palaeozoic era.

但其基底地层和混合岩形成时代较晚，为寒武纪和下古生代。

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To be born during this, the Cambrian Explosion—why, I couldn't imagine a better period, really.

在寒武纪生物大爆发这时候降生-我实在没法设想一个更好的时代了，真的。

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"An increase in land plant abundance may have occurred at the time just before the period known as the Cambrian Explosion, when the next Snowball Earth period failed to occur because temperatures did not get cold enough, " he added.

BBC: Earth AP