Curiosity Stream

What If: Prehistoric

76% loved this3 episodes4KCC
Plans start at $4.17/month

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

Love What If: Prehistoric? It’s just the start.

Join now to unlock the whole library — thousands of award-winning documentaries beyond What If: Prehistoric, from the deep ocean to deep space.

  • New shows weekly
  • Exclusive originals
  • Watch anywhere
  • No commitment

Pick the plan that’s right for you.

Flexible plans, no contracts.

Thousands of documentaries across nature, history, space, and science.

  • Watch in 4K on all your devices
  • Download and watch offline
  • Stream ad-free — cancel anytime
Cancel anytime, on either plan.

Thousands of documentaries across nature, history, space, and science.

  • Up to 4K
  • Offline downloads
  • Ad-free

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. Plans start at $4.17/month.

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.

Got your answer? Pick a plan and start streaming.