Revisit vanished worlds where giant reptiles, ancient seas, and supercontinents collide.
This series explores bold prehistoric what-if scenarios, from dinosaur-era landscapes and ancient oceans to the forces that shaped early life on Earth. You will uncover how shifting climates, evolving predators, and changing continents transformed the planet long before humans arrived. Sign up to watch ideas from deep time come vividly into focus.
Episode guide
3 episodes- New shows weeklyFresh documentaries land every week.
- Exclusive originalsAward-winning films you can’t stream anywhere else.
- Watch anywherePhone, tablet, web and TV — pick up where you left off.
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Frequently asked questions
Thousands of the world's best documentaries and factual programming — nature, history, science, technology, and biography — including exclusive Curiosity Originals like What If: Prehistoric. Stream it all ad-free, anytime.
What If: Prehistoric streams with every plan.
Watch on the web, iOS and Android, Roku, Apple TV, Amazon Fire TV, Chromecast, Android TV, and most smart TVs. Start on one device and pick up right where you left off on another.
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