There's something strange about the five newly discovered snakes in Ecuador: Unlike most snakes that dine on rats, lizards and other small animals, these slithery reptiles eat snails.
The rat snake was just a newborn when it was brought to the zoo, where it was quarantined for 18 months to better its survival chances.
With an interest in snakes that dates back to his teens, Stephen Mackessy vigorously studies how venom toxins affect humans
