The island of Queimada Grande, off the coast of southeastern Brazil, is the kingdom of a snake called Bothrops insularis. Pit vipers related to rattlesnakes but much more poisonous, they swarm in the ...

The serpent that gave origin to all jararacas – the number 1 – must have arrived in South America between 11 million and 20 million years ago. Probably it came from Central America, moving from one ...