NIXA, MO -- A Missouri man died in his sleep just hours after he was bitten by a snake and refused to seek medical attention. Snake bites are pretty rare, and it's even more rare to have a fatality.

High-speed video helped researchers to get close-ups of the attack strategies of three snake families. By Ari Daniel Venomous snakes inhabit a different perceptual world than we do. “Before the mammal ...