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From explosive disasters to clean energy ambitions, hydrogen has shaped some of humanity's greatest triumphs and tragedies.

Phosphorus is essential to life on Earth, but in the wider universe, it's surprisingly scarce, earning it the nickname “life's bottleneck” ...

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What makes ultramarine so vibrant? The answer lies in the unique chemistry of lapis lazuli. Deep within this rare Afghan stone, ...

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!

Gold's journey doesn't end when it reaches Earth. Carried by rivers over millions of years, it travels across landscapes before ...

The Earth & Space Science Regents is almost here! If you're within 24 hours of test day, this is the video you need to watch.

Some of the chemistry that makes up our genetic code may have existed before Earth itself. Found inside 4.6-billion-year-old ...

Nobody has made it to the center of the Earth—but not for lack of trying. In this episode of Crash Course Geology, we'll journey ...

What do you do when roads are impossible to build? In Brazil's densely populated favelas, engineers found an unexpected ...

In this video, we review 25 high-value Earth & Space Science concepts that show up again and again on exams. This review is ...

Chris Packham explains that there is much more to the humble egg than first meets the eye. Find out where to watch Evolution ...

From the Rare Earth hypothesis to what our first alien encounter could be like, watch as scientists consider if we are alone in the ...

Gold is rarer than it seems, yet it's everywhere, from jewellery to technology. But its journey is far more complicated than you might ...

What can a moon rock tell us about Earth's distant past? All kinds of stuff! Like where its water came from, how it got its moon, and ...

Antoni van Leeuwenhoek built tiny instruments that revealed a world no one had seen before. What he found through his lenses ...

Welcome to Part 5 of my NYSSLS Earth & Space Science Regents Survival Guide series. In this video, we review Unit 4: Weather ...

Why do humans have such a wide range of skin tones? The answer lies in our long relationship with the sun. Discover how UV ...

Why does Earth's atmosphere have layers? Neil deGrasse Tyson and Chuck Nice break down the different layers in Earth's ...

Helium isn't just for balloons — it's critical to everything from medical scanners to space technology. As supplies run low, scientists ...