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Devonian Period – Gondwana, ferns, lungfish

By |2019-05-07T05:56:55-07:00June 24th, 2017|Biology, Geology|

Coelocanth: a fish from the Devonian period When was the Devonian period? Four hundred and sixteen million years ago, when the Silurian period ended and the Devonian period began, most of the land on Earth was clumped together into a supercontinent called Gondwana. Silurian period Plate tectonics All our geology articles Life in [...]

History of Fish – Biology

By |2019-06-09T19:14:03-07:00May 26th, 2017|Biology|

History of fish: it looks like a severed tentacle but it's a lamprey. When did fish evolve? About 510 million years ago, in the Cambrian period, some of the worms on Earth evolved into the earliest fish. Segmented worms The Cambrian Period All our biology articles How were fish different from worms? Fish [...]