常速英语

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[music plays] [SCHYLER:] I'd been in the borderlands for 15 years before the first wall went up. And since then, there've been dramatic changes that have really just been heartbreaking ...

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You are cells. Your muscles, organs, skin and hair. They are in your blood and in your bones. Cells are biological robots. They don’t want anything, they don’t feel anything. They are neve...

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There are 79 known moons of Jupiter What if we moved Earth into its orbit, too? How would Jupiter's super-strong gravity affect our lives? How long could you survive on a freezing plane...

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In a world exhausted of fossil fuels, solar panels can provide a sustainable solution to our energy problems. But they also come with a couple of issues: for one, solar farms are massive, ...

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Black hole stars may have been the largest stars to ever exist. They burned brighter than galaxies and were Larger than any star today or that could ever exist in the future. But besides...

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[computer keyboard tapping] [music plays] [O'BRIEN:] I am fearful of the day when I put my hands on the keyboard and not know what to do. This is a painful naked story for me to tel...

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What if our Moon had a twin? Seeing not just one, but two of these satellites in the night sky might be spectacular. But how would a second moon affect the ocean tides? This is WHAT IF, ...

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Hold on tight, turn up the elevator music, and get ready for a whole new mode of space exploration! Forget rocket launches! We already use elevators to bring us to extreme heights in our ta...