Gripping the ice with his sharp claws, the polar bear leaned over the edge of the ice, sniffing the air and taking in the foreign scent of the 50 sweaty, sunburnt tourists, expedition leaders and crew.

BBC: Life in the fragile, frozen Arctic

While the first felines of the 1950s were ferocious, with yellow eyes and sharp claws, by the 1960s they had a playful, cublike look.

WSJ: The Sublime Cats of Cartier

The 12ft long creature, similar to the Velociraptor created for the film Jurassic Park, was equipped with murderous claws, razor sharp teeth and unusually long hindlegs.

BBC: News | Sci/Tech | New dinosaur discovered in England

He's not as smart as a gorilla, but he's a finely tuned predator, and heavily armed with 60 huge, sharp teeth as well as massive claws on his feet and hands.

FORBES: King Kong Vs. T. Rex