When the oceans died and life changed forever

A rapid climate collapse during the Late Ordovician Mass Extinction devastated ocean life and reshuffled Earth’s ecosystems. In the aftermath, jawed vertebrates gained an unexpected edge by surviving in isolated marine refuges. Over millions of years, they diversified into many forms while competitors faded away. This ancient reset helped determine which creatures would dominate the planet ever after.

source https://www.sciencedaily.com/releases/2026/01/260110211202.htm