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As state-legalized cannabis spreads, NOVA explores its little-known risks and benefits.

Take a tasty look at insect foods that could benefit our health and our warming planet.

Can skyscrapers be made safer, more efficient, and livable in our rapidly growing cities?

As we excavate a 500-year-old wreck, learn the secrets behind history’s great ships.

Could the source of the deadliest viruses hold the secret to a healthier and longer life?

What can DNA testing companies reveal about our ancestry and health, and at what risk?

Can bringing predators—and fear—back into an ecosystem help restore its natural balance?

Scientists hunt for a mega-eruption that plunged medieval Earth into a deep freeze.

Discover the world of medieval knights and see how their armor was made.

How has China’s magnificent Forbidden City withstood centuries of earthquakes?

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