Imagine Earth covered in thick sheets of ice and sea levels so low you could walk to a different continent. This is what our planet would look like during an ice age. There have been five of them in Earth’s history, and they have had a huge impact on our present world.

Now, try and imagine an Earth where these ice ages never existed in the first place. What ecosystems would change? Would humans have evolved? Why do ice ages happen? What are Milankovitch cycles? Would there be climate change? How different would the season cycles be?

Transcript and sources: https://whatifshow.com/what-if-the-ice-age-never-happened/

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What If is a mini-documentary web series that takes you on an epic journey through hypothetical worlds and possibilities. Join us on an imaginary adventure through time, space, and chance while we (hopefully) boil down complex subjects in a fun and entertaining way.

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