The hidden physics behind radioactivity, fusion, time, light, and oil.
This season turns pivotal scientific ideas into vivid stories, from natural radioactivity and nuclear fusion to the nature of time, the photoelectric effect, and the origins of oil. You will see how discoveries, experiments, and world-changing technologies connect across history, making complex science approachable, rewarding, and hard to stop watching.
Episode guide
13 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
Yes. Every plan unlocks the full library — including all Curiosity Originals like Butterfly Effect (Season 5) — in up to 4K, ad-free, on all your devices.
Butterfly Effect (Season 5) is a Curiosity Original, exclusive to Curiosity Stream.
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.
Curiosity Stream is our streaming service — thousands of documentaries and originals. The Smart Bundle is Curiosity Stream plus four other independent streaming services (Tastemade, Kidstream, Curiosity University, and SOMM TV) on a single subscription.