Bill Nye has been our hero since his Bill Nye the Science Guy days in the ’90s, when he managed to awaken a whole generation of kids to the awesomeness of science. In recent years, the scientist and mechanical engineer has been recognized as a serious authority in the field, appearing on networks like CNN to illuminate such topics as global warming and the Japanese nuclear crisis. He even helped build a sundial used in the recent Mars Rover mission. Now, Nye has a Big Think video out in which he explains why it’s important to teach kids evolution, rather than creation. “Evolution is the fundamental idea in all of life science, in all of biology,” he says. “It’s very much analogous to trying to do geology without believing in tectonic plates. You’re just not going to get the right answer. Your whole world is just going to be a mystery instead of an exciting place.” Watch the entire excellent interview below.