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!

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.

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

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.

This season on Legend of Croc Gold, Farley Dean and his mining crew venture into uncharted territory and contend with deadly crocodiles as they search for gold off the coast of Papau New Guinea.

Ian, Meghan, and Bryce begin a 4-hour boat journey down a crocodile-infested river to begin their gold mining expedition.

After their boat gets caught in crocodile-infested waters, Ian bravely steps into the water to try and get them unhooked.

Croc Jim and the team set up an elaborate bamboo trap to try and catch a notorious 10 foot crocodile. Dredging for gold in the area will only be safe once the crocodile has been removed.

Croc Jim and Sekeli work to remove a 9 foot crocodile from the dredging area. It's a huge reminder of the dangers of Bougainvaille Island.

Chief Gordon and the Bougainville Island natives begin to distrust Farley and his team after 13 days on the island produce little gold.

For every incredible moment of footage in the Africa series, there are countless stories of filmmaking hardship. See what it was really like to make Africa.

In this behind-the-scenes web exclusive, Africa producer Hugh Pearson reveals how one of the most violent giraffe fights ever seen was filmed.

Go behind the scenes of AFRICA with wildlife cameraman Charlie Hamilton James, who explains how he filmed the lizards and lions sequence.

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.

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

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.