Watch the full episode: youtube.com/watch?v=-iqrtHHmTM4 What if all the Earth's land became ocean, and all the oceans became land? And what if our mountains turned into deep trenches, while the trenches grew to the highest peaks on the planet? What would this new world look like? Questions or concerns? Contact us at underknown.com/contact Interested in sponsoring our episodes or collaborating? Email us: inquiries@underknown.com Get our 100 best episodes in one mind-blowing book: bit.ly/ytc-the-what-if-100-book Join this channel to get access to perks: youtube.com/channel/UCphTF9wHwhCt-BzIq-s4V-g/join Check out our other channels: How to Survive: bit.ly/how-to-survive-show Aperture: bit.ly/aperture-show Crazy Creatures: bit.ly/crazy-creatures-show Your Body On: bit.ly/your-body-on-show Origins of Food: bit.ly/origins-of-food Versus: bit.ly/versus-show WTF Did I Just Watch: bit.ly/wtf-did...