Komodo dragons, the world’s largest species of lizard, have iron-tipped teeth that help them to rip their prey apart, according to new research.

7 of world's largest and deadliest reptilesBlack mamba: It is the second-longest venomous snake after the king cobra that can commonly grow to 3 m (9.8 ft).

Komodo dragons are the largest species of lizard in the whole world, and the zoo's new pair could grow to more than three metres long and weigh up to 90kg.