This man came up with most credible explanation for Earth’s biggest mass extinction

Rocks, cliff faces, quarries gouged in earth. Not much for most of us to look at, but for paleontologist Andrew Knoll, they are radiant with meaning, telling a story he says is far grander and stuffed with more plot twists than any Hollywood blockbuster.

Rocks, cliff faces, quarries gouged in earth. Not much for most of us to look at, but for paleontologist Andrew Knoll, they are radiant with meaning, telling a story he says is far grander and stuffed with more plot twists than any Hollywood blockbuster.