Meet _Qikiqtania_, a fossil fish with the good sense to stay in the water while others ventured onto land

By Thomas Stewart, Assistant Professor of Biology, Penn State

Approximately 365 million years ago, one group of fishes left the water to live on land. These animals were early tetrapods, a lineage that would radiate to include many thousands of species including amphibians, birds, lizards and mammals. Human beings are descendants of those early tetrapods, and we share the legacy of their water-to-land transition.

But what if, instead of venturing onto the shores, they had turned back? What if these animals, just at the cusp of leaving the water, had receded…

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