How did the Mosquito production crew capture those incredible close-up shots of mosquitoes? They explain in this exclusive behind-the-scenes clip.

When a mosquito bites a human carrying a virus, the mosquito becomes infected and its saliva now carries the virus. When it bites its next victim, the virus spreads to the next person.

On July 29, 2016, Florida became the first U.S. state to see a locally transmitted Zika case. For families like the Fuhrmans, it means a nightmare scenario could become reality.

It's estimated that 700 million cases of malaria have been averted thanks to bed net distribution in sub-Saharan Africa. Still, experts have yet to find the "silver bullet" to win the war.

Shot on four continents, MOSQUITO features insights from world and health leaaders as well as intimate stories of the men, women, and children who are living in feare that the next bite could be a deadly one.

In Man, Cheetah, Wild, Kim Wolhuter gets closer than you've ever seen to wild cheetahs.

An F5 tornado is heading straight for the hospital where Shay-la is having her labor induced. She's already had the epidural so there's no stopping the labor now.

A baby mountain goat gets separated from its mother and must battle the raging rapids to be reunited.

Olive Ridley sea turtle hatchlings run the gauntlet in Costa Rica. Only 5 out of 100 will make it through their first 8 hours out of the nest.

Sights from the Sierra Nevada Mountains.

Watch a special sneak peek of the epic seven-part series North America. Discovery.com/NorthAmerica

Go behind the scenes of the fighting mustangs sequence with North America cinematographer Sophie Darlington.

Sights from the Great Smoky Mountains.

In this deleted scene from North America, gray wolves hunt caribou in Labrador, Canada. Their hungry pups are counting on them to make a successful kill.

Sights from Colorado Plateau.

Untamed wilderness is just beyond our own backyards. North America, the next groundbreaking natural history series from Discovery Channel. Discovery.com/NorthAmerica

Sights from Acadia National Park.

Sights from Shenandoah National Park.

Sights from Olympic National Park.

Sights from Glacier National Park.

In the wintry foothills of North America, a baby black bear's life begins. He must "learn the ropes" from mom in order to survive.