It's a myth that these venomous vipers will always shake its rattle before attacking, but a rattlesnake bite still packs a punch.
A long-lasting chemical compound in the venom of platypuses and echidnas helps regulate blood sugar.
The Southern grasshopper mouse is shockingly tough.
Herpetologist Karl P. Schmidt didn't know his bite was lethal, and stayed curious and discovery-oriented until the very end.
Venomous bites can paralyze and kill prey. But what happens when a snake is exposed to its own toxins?