What does the diversity of life on Earth have in common with many superheroes: mutations! Evolution is all about increasing complexity via tiny changes in DNA. But these mutations are a bit different from the ones you read about in comic books.

Did ancient meteors bring life to Earth or did organic chemicals form when lava mixed with water deep in the ocean? Hey now, there’s no need to fight about it! Let’s explore the theories about the origins of life on our planet.

Did you know that birds are descendants of dinosaurs? How is that possible? It has a lot to do with environmental changes and that complex molecule you’ve been hearing so much about called DNA.

The dinosaurs were wiped out 65 million years ago. Could you survive an extinction event? Time to use your Big History knowledge to put together a survival plan—and consider if we should bring some dinosaurs back to life!