Take a look at the reptiles that humans may fear most: Snakes. Look into their secret and very strange world to try to understand them better.

Snakes are often hated and feared. But there are good reasons to keep them around your home or garden. They can keep pests, such as rats and mice, in check.

Scientists use venom to develop antivenoms, and the toxic compounds may also yield new drugs to treat everything from crippling strokes to deadly heart attacks.

Invasive species can cause devastating economic and environmental impacts. Here are 10 animal species considered to be among America's Least Wanted.

View additional resources, online and in print, for NATURE's "The Venom Cure."

There are not many people in the world who know more about snakes and snake venom than Bill Haast does. Haast has spent more than 50 years working with snakes.