Curiosity Stream
Sign In

What If: Prehistoric

3 episodes 79%4KCC

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
1
1Back in Time
Travel through Earth’s past to explore pivotal moments that shaped life as we know it. From evolutionary turning points to environmental shifts, discover how different outcomes could have changed the course of history.
24 min
2
2Megolodon vs. Mosasaurus
Dive deep into an epic clash of the prehistoric titans: Megalodon and Mosasaurus! Drawing on fossil evidence and scientific insight, we see how such a battle might unfold in ancient oceans.
22 min
3
3Time Before Land
Journey to Earth’s earliest eras, when oceans dominated and land had yet to take shape. Explore the origins of life and the environments that set the stage for everything that followed.
24 min
Good to know

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.

Plans are billed annually — every plan streams in 4K. The Smart Bundle adds four partner services. There are no contracts — cancel anytime.

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.

Yes. The library is full of family-friendly nature and science programming, and the Smart Bundle includes Kidstream — carefully chosen, ad-free shows kids will love and parents can trust.

Absolutely. There are no contracts and no cancellation fees — manage or cancel your plan anytime from your account settings.

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.

Yes. Start on any plan and move up to the Smart Bundle whenever you like — the change takes effect right away, and your billing is simply prorated from your account settings.

Got your answer? Pick a plan and start streaming.Start streaming
Available now

Start watching What If: Prehistoric today

Stream thousands of award-winning documentaries. Cancel anytime.

Start streaming