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Arctic Sinkholes Preview
Colossal explosions shake a remote corner of the Siberian tundra, leaving behind massive craters. In Alaska, a huge lake erupts with bubbles of inflammable gas. Scientists are discovering that these mystifying phenomena add up to a ticking time bomb, as long-frozen permafrost melts and releases vast amounts of methane, a potent greenhouse gas.
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53:31
Explore great ancient Maya cities and why their inhabitants abandoned them.
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53:28
Take a tasty look at insect foods that could benefit our health and our warming planet.
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Join the hunt for the universe’s most common—yet most elusive and baffling—particle.
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As state-legalized cannabis spreads, NOVA explores its little-known risks and benefits.
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A revealing new investigation of one of history’s most iconic aviation disasters.
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Scientists race to help corals adapt to warming oceans through assisted evolution.
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NASA launches its most ambitious search yet for traces of ancient life on Mars.
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Discover the fascinating chemistry that makes our world and everything in it—including us.
53:30
Discover the fascinating chemistry that makes our world and everything in it—including us.
53:31
Discover the fascinating chemistry that makes our world and everything in it—including us.
53:31
Scientists look to geoengineering and other methods to cool the planet.
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1:33:41
We can now edit the human genome with a tool called CRISPR. But how far should we go?