A fossil analysis suggests that the yunnanozoan, a wormlike fish that flourished around 520 million years ago, sported structures that were the precursors of the head and jaws of modern vertebrates.

Fish can change their teeth quickly, which speeds up their evolution. Cichlids in African lakes show the fastest ...

When you’re just getting started trout fishing, even small streams can feel overwhelming – it feels like the fish could truly ... flows are created by solid structures that water must flow ...