Learn more about a time period marked by an intense burst of evolution. 3 min read The Cambrian period, part of the Paleozoic era, produced the most intense burst of evolution ever known.

“I played a character in The Razor’s Edge, and we did the movie as a period movie,” Murray said. “At the time, there was talk that maybe we should have made it as a modern movie. Now I ...

Internal, genetic factors were also crucial. Recent research suggests that the period prior to the Cambrian explosion saw the gradual evolution of a "genetic tool kit" of genes that govern ...