Underneath Antarctica's ice, there's a deep, dark secret. Today, we're going to melt all that ice to find out how it would transform Earth. What mysteries lie buried deep under its thick frozen surface? As the ice melts and sea levels rise, what would happen to our coastal cities? And why might this lead to some unexpected diseases?

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Enjoying this video? Dive even deeper into the world of science and discovery with Popular Science, the free streaming channel bringing you more of what you love from What If, plus epic explorations in engineering, rocket launches, movies, space, and Earth sciences here.

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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.

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So you wake up one day and find that you're the only person left in the world. Kind of cool, right? No obligations, no rules, no limits. Go nuts! Actually, go for the exotic fruits first. If your mangos and bananas are imported from overseas, chances are they'll be hard to get to. So eat them while you can, and enjoy every last bite. You might think that with no one stopping you, you could go anywhere!

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This is the Titanoboa, one of the largest and deadliest snakes ever to exist, which went extinct 55 million years ago. But what if it never happened?

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Since the beginning of time, Earth has created life and then wiped out most of it in catastrophic, ultra-destructive moments. Early Earth was already a hostile place, but these savage events were the absolute worst periods in history to be alive. So naturally, I thought it'd be fun to send me there.

Obviously, I can't travel back in time, but DigiPeter can. In this video, we'll show you just how you would die during the most dangerous times Earth has ever seen.

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Ever wondered what humans or any life would look like if evolution happened on Jupiter instead of Earth? This gas giant has no solid surface, crushing gravity, insane storms, and toxic atmosphere. Could life even emerge there?

This distribution was conducted on behalf of Envoy Medical, Inc. (NASDAQ: COCH) and was funded by Outside The Box Capital Inc. after Underknown Inc. was engaged by Outside The Box Capital Inc. to advertise for Envoy Medical, Inc. (NASDAQ: COCH). For our full disclaimer, please visit: here.

The information presented or discussed is for general information purposes and may not be representative of all patient outcomes. It is not intended to substitute for professional medical advice and should not be interpreted to contain treatment recommendations. Each person’s situation is unique, and risks, outcomes, experience, and results may vary. Talk to your healthcare professional about which product or treatment may be right for you. Please see complete product instructions for use, including all product indications, contraindications, precautions, warnings, and adverse events. Please view important safety information here.

The fully implanted Acclaim(R) cochlear implant is an Investigational Device undergoing clinical trials. CAUTION - Investigational Device. Limited by Federal (or United States) law to investigational use.

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What if we actually nuke Uranus? No, seriously — what would happen if we sent every nuke on Earth straight to the seventh planet? Would it blow up? Catch fire? Turn into a second Sun? Or just make the solar system’s biggest fart joke come true?

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There's a needle approaching Earth at the speed of light. A needle? Pfft! That's no big deal, right? Well, unfortunately, it's a very big deal. A needle traveling this fast can cause devastating effects on Earth. But why? What kind of destruction could this tiny little needle cause? And in what scenario would this be possible?

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Elon Musk wants to nuke Mars. What are the consequences? Without nukes, life on Mars might involve living in giant glass domes and growing small portions of food inside. If you venture outside, it would be in a large, clunky spacesuit, limiting your time outdoors. But Mars could end up resembling Earth more closely. How?

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Explore the possibilities of swapping Earth's Moon with some of the universe's most intriguing alien planets. What changes would Earth experience with a potentially habitable planet or a massive super-hot giant in its orbit?

We'll begin with Proxima Centauri b and progress to more extreme planets like Kepler-22b, 55 Cancri e, WASP-12b, and Beta Pictoris b. Can Earth handle such celestial neighbors?

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