While bats have been implicated in deadly epidemics such as COVID-19 and Ebola, scientists are discovering evidence that they may hold a key to a longer and healthier life.

On Extreme Animal Weapons, explore the secrets that underlie nature’s battleground. Every animal has some kind of weapon, whether it’s claws or horns, fangs or stings. But why are some armaments huge and extreme, far beyond any practical need?

A bold experiment to bring fierce African wild dogs back to Gorongosa National Park in Mozambique reveals how predators—and the fear they trigger—play a crucial role in keeping wild ecosystems healthy.

The Planets: Inner Worlds features the rocky planets - Mercury, Venus, Earth and Mars. All four were born of similar material around the same time, yet only one supports life. Were Earth's neighbors always so extreme? Is there somewhere else in the solar system where life might flourish?

In the dark depths of the oceans, nearly 90 percent of all species shine from within. Whether it’s to scare off predators, fish for prey or lure a mate, the language of light is everywhere in the ocean depths, where most creatures flash, sparkle, shimmer, or simply glow.

In a collision with Earth, asteroids could set off raging fires and colossal tidal waves. Yet some asteroids are loaded with billions of dollars’ worth of elements. Will asteroids turn out to be our economic salvation — or instruments of extinction?

A newly discovered 500-year-old wreck offers vital clues to this momentous innovation.

Can new emission-free electric planes replace our airliners?

Hear the personal stories of those struggling with infertility.

Women make up less than a quarter of STEM professionals in the United States, but a growing group of researchers is writing a new chapter for women scientists, exposing longstanding discrimination. NOVA Picture a Scientist introduces female scientists who provide new perspectives on how to make science itself more diverse, equitable and open to all.