What If Aliens are Living Inside Earth?

Billions of years ago, another planet smashed into Earth. An event of this epicness could have created our Moon. It also could have brought alien life to our planet. What evidence of this planet still exists on Earth today? Could there be life deep inside the Earth’s surface? And could that life be an advanced civilization of humanoid aliens? Would it be possible for subterranean cities to exist within Earth? Transcript and sources: 00:00 Could aliens be living deep inside of Earth? 00:41 Protoplanet Theia striking Earth and creating the Moon. 01:51 The different layers of Earth and Hollow Earth theory. 03:02 What would the life conditions deep inside of Earth be? Questions or concerns? Contact us at Get our 100 best episodes in one mind-blowing book: Join this channel to get access to perks: Check out our other shows: How to Survive: Your Body on: Crazy Creatures: Watch more what-if scenarios: Planet Earth: The Cosmos: Technology: Your Body: Humanity: T-shirts and merch: Suggest an episode: Newsletter: What If elsewhere: Instagram: Discord: Twitter: Facebook: What If in Spanish: What If in Mandarin: Podcast: 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. Produced with love by Underknown in Toronto: Contact us at #Whatif #Alien #Theia #HollowEarth #AncientAliens