Both snakes are deadly, but which is more venomous, aggressive, or lethal to humans in a real-life encounter? Find out how they compare.

Snakes don’t always get credit in the brains department. With no limbs and a blank stare, they’ve been cast as simple predators, slithering on instinct, but some snakes are surprisingly clever.

Covering more than 2 million square miles in South America, the world's biggest tropical rainforest hides lots of scary secrets—and some beautiful ones too A look inside the rainforest The Amazon ...