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The term big cat – which is not a biological classification – is used informally to distinguish the larger felid species from smaller ones. One definition of "big cat" includes the four members of the genus Panthera: the tiger, lion, jaguar, and leopard. Members of this genus are the only cats able to roar. A more expansive definition of "big cat" also includes the cheetah, snow leopard, and cougar...

The pilot whale is either of two species of cetacean in the genus Globicephala. The genus is part of the oceanic dolphin family (Delphinidae) although their behavior is closer to that of the larger whales. The two species are the Long-finned Pilot Whale and the Short-finned Pilot Whale. The two are not readily distinguished at sea. They and other large members of the dolphin family are also known as blackfish. Pilot Whales are jet black or a very dark grey color...

If Batman had a cat, it would probably look something like this. The household pet, named Yoda, was born with an extra set of ears. Valerie and Ted Rock took him in two years ago after visiting a bar near their home in Chicago, where he was being passed round by curious drinkers. He was one of a large litter and the owners were looking for a home for him. The couple immediately fell for the freaky feline and asked the owner if they could adopt him...

Porcupines are rodents with a coat of sharp spines, or quills, that defend them from predators. They are indigenous to the Americas, southern Asia, and Africa. Porcupines are the third largest of the rodents, behind the capybara and the beaver. Most porcupines are about 25–36 in (63–91 cm) long, with an 8–10 in (20–25 cm) long tail. Weighing between 12–35 lb (5.4–16 kg), they are rounded, large and slow. Porcupines come in various shades of brown, grey, and the unusual white...