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      Cosmos

      What If We Extinguished the Sun?

      August 30, 2019
      Earth, Science

      What If Earth’s Atmosphere Was Pure Oxygen?

      June 29, 2019
      Cosmos

      What If Earth Had Jupiter’s Atmosphere?

      September 22, 2022
      Earth

      What If We Entered a New Ice Age?

      September 7, 2022
      Earth

      What If South America Disappeared?

      August 16, 2022
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      HTS MSN

      155 Miles of Land Mines Separate Two Nations, and Tourists Still Enter

      This is the Demilitarized Zone or DMZ. It acts as a border between North and South Korea. As dangerous as it looks now, this place is visited by over a million tourists...

      Cosmos

      What If a Dark Hydrogen Iceberg Fell to Earth?

      A mysterious interstellar object is on a collision course with Earth. And scientists don’t know what it is. What could this new astrophysical object be? Where did it...

      Earth

      What If Lightning Storms Never Stopped?

      Your body is shaking and you’re feeling nauseous. There’s a sharp pain in your chest, and with each passing moment, it gets harder and harder to breathe. And...

      Earth, MSN New

      What If 3I/ATLAS Struck Earth at Full Speed?

      Meet comet 3I/Atlas. A collision with this rock would release the same kind of energy that a certain other asteroid did 66 million years ago, ending the reign of the...

      MSN New

      What Would a Supervolcano Do to the United States?

      Deep beneath the United States lies one of the most powerful volcanic systems on Earth. Yellowstone is not a typical volcano sitting on a mountain peak. It is a...

      MSN New, Cosmos, Humanity

      The ISS Retires in 2030, and Private Companies Are Already Building What Replaces It

      The International Space Station is dying, and there is a date on it. Air leaks. System failures. Two decades of continuous operation finally catching up with a machine...

      MSN New, Humanity

      Are We About to Create a Superintelligence That Outsmarts Us?

      We heard the warnings. But we didn’t listen. Now, we live in a world controlled by artificial intelligence. How did we let this happen? Will we able to survive...

      HTS MSN

      The Only Way to Walk Away From a Helicopter Crash

      Helicopters have many unique advantages beyond just getting from point A to point B. They can act as ambulances to help ferry injured people to safety. They fight forest...

      HTS MSN

      It Was His First Day at the Factory, and He Was Crushed by a Machine He Thought Was Off

      Starting a new job is supposed to be the beginning of something positive. For Lawrence “Day” Davis, however, his first shift at a factory ended in tragedy...

      HTS MSN

      A British Naturalist Heard the Screams All Night, and the Legend Was Born

      He was a naturalist, not a soldier, attached to British forces on an island off the coast of Burma. What he described hearing that night in 1945 turned into one of the...

      MSN New, Earth

      If Earth Tilted on Its Side, Life Would Get Strange Fast

      During Earth’s early days, a gargantuan collision left our planet spinning at an angle. That slight incline allowed life as you know it to flourish. But what if this...

      MSN New, Humanity

      Ending All Animal Testing Tomorrow Would Have a Hidden Cost

      Animal testing remains one of the most controversial parts of modern science. Every year, millions of animals are used in experiments designed to develop medicines, test...

      HTS MSN

      5 Dangerous Mistakes People Make During Cat Attacks

      Cats may be known as cute and playful pets, but they are still predators with sharp claws, powerful jaws, and lightning fast reflexes. While most cats avoid serious...

      MSN New, Earth

      Mammoths Are Walking the Earth Again, and Here’s What Changed

      For thousands of years, woolly mammoths existed only in fossils, frozen remains, and cave paintings. But now, scientists are closer than ever to bringing these Ice Age...

      MSN New, Cosmos

      Dumping Every Drop of Earth’s Water on the Sun Would Only Make It Burn Hotter

      The planet is heating up and everyone is looking for a solution, so here is one that sounds almost reasonable at first. Take every drop of water on Earth and dump it on...

      MSN New, Humanity

      We Haven’t Even Reached Type I. Here’s How Far Behind Humanity Really Is

      On a cosmic report card, humanity does not even earn a passing grade. There is a scale scientists use to measure how advanced a civilization truly is, and it has nothing...

      MSN New, Earth

      Neanderthals Are Living Among Us Again, and Here’s What Changed

      Imagine walking down a busy city street and passing someone who looks almost human but not quite. They are shorter, broader, with a larger brow ridge and a more powerful...

      HTS MSN

      Lost in the Desert? According to Science, Here’s How to Stay Alive

      Few environments on Earth are as unforgiving as the desert. Humans are built to survive within a fairly narrow range of temperatures, and we depend on a steady supply of...

      MSN New, Earth

      Earth Would Shake for an Entire Year, and Humans Would Have to Adapt

      Earth can be full of extremes. But today, there is only one extreme. Non-stop earthquakes that last an entire year. What would it be like to live under such shaky...

      MSN New

      What If a 40 Foot Wingspan Predator Appeared in Modern Cities?

      Imagine walking out of your office during lunch and suddenly noticing people staring at the sky. A massive shadow passes overhead. At first, you think it is a small...

      1 2 3 … 122 Next

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      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.

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