Step into bold thought experiments at the edge of the universe.
This series explores black holes, alternate realities, and cosmic mysteries through imaginative what-if scenarios. Each episode turns big scientific questions into vivid possibilities, inviting you to think deeper about how the universe works. Sign up to watch a distinctive exploration of ideas that expands curiosity with every new question.
Episode guide
12 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.
- No commitmentNo contract. Cancel in a click.
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: Cosmos. Stream it all ad-free, anytime.
What If: Cosmos 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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