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

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.

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.

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

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.

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.

How was Racing Extinction's mobile projection vehicle created? Learn more about the vehicle's unbelievable features - including its electroluminescent paint job, which is the first of its kind.

Piles of garbage bags in New York City act as a buffet for rats. And you wouldn't believe how many rats there are in the Big Apple!

Catch a sneak peek at the upcoming Morgan Spurlock documentary, "Rats".

Even if you can't see them, rats are lurking everywhere in most big cities. They're just waiting for the right moment to enter your home to look for food.

The Rat Project team is responsible for examining the disease emergence among rats in post-Katrina New Orleans. It's essential to protect humans from the parasites that can be transmitted from rats.