Watch the full episode here: youtu.be/zxFHw0p50Xg Could a monster be lurking in our oceans? And no, we’re not talking about the Loch Ness Monster or the Megalodon, we’re talking about a creature you probably have never heard of. The Mosasaur. But what is a Mosasaur? Could it have survived the great extinction? And if it did, how would it change our oceans? 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 Get a Cameo by Peter: cameo.com/whatifguy Check out our other channels: How to Survive: bit.ly/how-to-survive-show Aperture: bit.ly/aperture-show Your Body On: bit.ly/your-body-on-show Watch what-if scenarios by topic: Planet Earth: ...