The Cambrian Explosion Was a Hot Event

The Cambrian Explosion Was a Hot Event
AP Photo/National Park Service

New research involving tiny fossil shells more than half a billion years old confirms that the Cambrian Explosion took place during a greenhouse climate.

The international study, led by researchers at the University of Leicester in the UK, has now been published in the journal Science Advances.

At the beginning of the Cambrian period around 540 million years ago, an evolutionary Big Bang took place. Where there had once been primarily single celled organisms, complex life swiftly emerged.

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