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      What If Show
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      Earth, MSN

      7 Ways Earth Was Completely Different 2 Billion Years Ago

      August 14, 2025
      Body

      What If Our Bodies Kept Evolving?

      January 3, 2020
      Body

      What If You Swallowed Mouthwash?

      July 28, 2021
      Science

      What If We’re Living in a Computer Simulation?

      December 1, 2018
      Science

      What If Planet X Was Real?

      October 26, 2018
      Earth

      What If a Megalodon Shark Fought the Kraken?

      The megalodon, the big boss of our ancient oceans, the king of all sharks, killer of whales. If you’re a fan, you’ve already witnessed our megalodon vs. mosasaur episode...

      Cosmos

      What If You Jumped on Every Planet in the Solar System?

      When I say jump, you say how high. Let’s put this to the ultimate test by hopping around the Solar System. Literally. What differences in gravity would you experience...

      HTS MSN

      He Was Pushed Into an Open Manhole, and Emergency Crews Could Only Watch

      Most people go through the streets of a busy city without giving much consideration to what is underneath their feet. However, in the case of a man from New York, a late...

      MSN New

      Could Giant Space Mirrors Replace Nighttime Darkness on Earth

      Humanity is already filling the space around our planet with machines. Around Earth, thousands of satellites are currently circling above us, each one serving a...

      MSN New

      What Would Happen If Saturn Took the Moon’s Place?

      The Moon has been quietly orbiting Earth for billions of years. It lights up our nights, influences the tides, and appears harmless from a distance. But imagine stepping...

      Cosmos

      What If a Black Hole Is Already in Our Solar System?

      Something strange is happening on the outskirts of our Solar System. It could be a large, mysterious planet. Or, it could be a black hole. How big would this black hole...

      HTS MSN

      How to Stay on Your Feet When a Crowd Turns Into a Stampede

      Have you ever been at a music festival, sporting event or a parade and felt just a little too crowded? As fun as crowd surfing, mosh pits, or cheering on your favorite...

      MSN New, Humanity

      What If You Brought Modern Technology to the Middle Ages?

      The Middle Ages, a time when you were more likely to die on the toilet than take a bath. And now you’re going there with an educational mission. It’s up to...

      DailyMoment, HTS MSN

      How to Survive Being a Sherpa

      You’ve done this more than a dozen times. The tallest mountain in the world is your workplace, and you know it like the palm of your hand. Unfortunately, your companions...

      Cosmos, MSN New

      What If a Nuclear Reactor Built by the U.S. Detonated on the Moon?

      Imagine looking up at the moon and seeing space dust floating around it. Maybe broken-off parts of the moon are raining down on Earth. You’d wonder what happened;...

      Humanity, MSN New

      What If China Invaded the US?

      China invading the U.S. is something that could turn the world on its head. Could the U.S. mobilize in time to respond? Would this be the start of World War III? The...

      MSN New

      What Would Happen If You Were Trapped in a Tanning Bed for 24 Hours?

      You probably already know that tanning under UV lights isn’t good for you. But to see just how harmful tanning beds can be, we’re going to crank up your exposure time...

      Science

      What If Time Travel Was Possible?

      What advice would you give your younger self if you could travel back in time?

      HTS MSN

      Mauled By His Tiger: The Siegfried & Roy Tragedy

      The sound was described by witnesses as loud and chaotic, a sudden eruption that cut through what was meant to be a carefully controlled stage performance. On October...

      Earth

      What If We Lost Gravity for 5 Seconds?

      Scroll down to watch our video. Unless you’re an astronaut, you probably don’t spend a lot of time thinking about gravity. We all take gravity for granted...

      HTS MSN

      Why a Swan Can Be Far More Dangerous Than It Looks

      A peaceful walk around a quiet pond sounds harmless. The gentle sound of water, the sight of birds floating across the surface, and the calm atmosphere can make you...

      HTS MSN

      The Flight That Should Have Never Happened: The Juliane Koepcke Story

      Imagine boarding a one hour flight with your mother on Christmas Eve. You’re 17 years old. The holidays are here. In just a little while, you’ll be...

      Earth

      What If Aliens Brought Life to Earth?

      It’s the oldest question on Earth. Where did we come from? Some people may thank a creator from above, but what if the hand that created humanity wasn’t...

      Earth

      What If the Megalodon Shark Fought the Leviathan Whale?

      Don’t be fooled by these gentle waves. These still waters hide a 20 million year death match between two prehistoric monsters. Grab some popcorn and a snorkel. You...

      Earth, MSN New

      8 Incredible Outcomes If Dinosaurs Kept Evolving

      Sixty five million years ago, a massive asteroid crashed into Earth and ended the age of the dinosaurs. But what if that never happened? What if dinosaurs had continued...

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      Popular What Ifs

      Humanity

      What If Humans Suddenly Went Extinct?

      Cosmos, Earth

      What If Earth and Moon Switched Sizes?

      Earth

      What If The Earth Had Two Moons?

      Body

      What If You Drank Only Water for the Rest of Your Life?

      Technology

      What If Every Satellite Fell to Earth?

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      Underknown

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      About

      What If is presented by Underknown, a production company creating a variety of short-doc series that search for the underlying truth of how our world operates and how it came to be. Our shows take you to the frontiers of science and make the most complex ideas and theories entertaining and accessible.

      Popular What Ifs

      What If Humans Tried to Land on Kepler 69c?

      What If We Are Not the First Advanced Civilization on Earth?

      Scientists Discovered the Most Terrifying Planet That Looks Like Earth

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