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.

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

For the male jumping spider, flirting with a female is a dangerous game. If he fails, she'll stab him and slurp out his insides; if he succeeds, she'll be mesmerized.

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

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.

A chipmunk gathers nuts for the winter, amassing about 6,000 of them by end of fall. But he needs to keep an eye out for pickpockets...

An old bighorn sheep and a young contender collide head-on in a fight for mating rights. Their thick, shock-absorbing skulls can withstand 800 pounds of force.

An acorn woodpecker guards its carefully stashed nuts from a very hungry and persistent squirrel.

Go behind the scenes of the alligator sequences with North America Cinematographer Sophie Darlington and Assistant Producer Ben Wallis.

The adorable collared pika is as cute and cuddly as they come, that is unless you're a bird that's blown off course in the Alaskan wilderness...

In this deleted scene from North America, starving bison struggle to survive when winter sets in, and a bison calf succumbs to the elements.

This one-pound bunny, called a pygmy rabbit, gets into a high-speed chase with a long-tailed weasel.

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

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.

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.

The amazing sights and sounds of North America's savage coasts come to life in our split-second highlights real.

The amazing sights and sounds of North America's savage coasts come to life in our split-second highlights real.

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

Meet some of the world's rarest amphibians, housed inside the frogPOD. Did you know that up to half of all frog species could be gone in the next 20 years?

Follow the Racing Extinction team as they test a new camera that records carbon dioxide emissions in infrared.

The Cornell Wild Acoustical Laboratory has been collecting animal sounds since the 1930s. Among their collections are animals that have gone extinct.

Scientists and experts explain the effect that skyrocketing carbon dioxide levels are having on our oceans and coral reefs - and why it matters.

Humans are rapidly driving many species to extinction. Hear the song of the last Kauai O’o bird and learn more about what is causing these mass extinctions.

The biggest factor in mass extinction is converting natural animal habitat to land used for food production. See how our way of producing food is contributing to a major pollution problem.

A team of artists and activists expose the hidden world of extinction with never-before-seen images that will change the way we see the world. Watch Racing Extinction with the world Wed Dec 2 9/8c.

Shawn Heinrichs recalls how he rescued a manta ray that was caught in a fishing line.

Will future generations look back on this time period as the time when we allowed all these amazing creatures to vanish? Dr. Jane Goodall believes education is the key to beating mass extinction.

Meet the team behind Racing Extinction -- undercover filmmakers working to save vulnerable species and helping combat the mass extinction currently unfolding.

Sharks have survived 4 mass extinctions and ruled our oceans for over 400 million years, yet humans have caused their population to decrease by 90-99% in the past 100 years.

Watch the inspiring story of how photographer Joel Sartore and the Audubon Society are helping save a rare sparrow teetering on the brink of extinction due to habitat loss.

In this behind the scenes clip, filmmaker Louie Psihoyos explains why he and his team decided to make a mark on New York City with the Empire State Building projections.

Marine conservationist Shawn Heinrichs explains how his life was once saved by a shark hook that he wears around his neck every day.