Fish Footprints

BBC News reports on “footprints of the first fish to walk on land“:

Researchers in the science journal Nature say the discovery of the footprints of a crocodile-like creature has led them to rethink our understanding of the evolution of life.

They don’t really say why exactly this is making them rethink things (no dates, etc.) I would be skeptical if the first fish on land had feet rather than fins, but maybe that’s the point.