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Tigers have striped skin, not just fur – The stripes on a tiger are not only on their fur but also on their skin, and no two tigers have the same stripe pattern.

Giraffes only need 5-30 minutes of sleep per day – These towering animals take short naps, usually standing up, and rarely sleep for more than a few minutes at a time.

Polar bears have black skin – Beneath their thick, white fur, a polar bear’s skin is black to absorb and retain heat from the sun in their icy environment.

A group of rhinos is called a "crash" – These large, powerful animals are often referred to as a "crash" when seen in groups, reflecting their hefty, charging nature.

Elephants can "hear" with their feet – Elephants are able to detect low-frequency vibrations through the ground with sensory cells in their feet, allowing them to sense distant movements or calls.

A cheetah can accelerate faster than most sports cars – Cheetahs can go from 0 to 60 miles per hour in just a few seconds, making them the fastest land animals over short distances.

Otters hold hands while they sleep – Sea otters often hold hands or form "rafts" to stay together while sleeping, preventing them from drifting apart in the water.

Lions are the only big cats that live in groups – Most big cats are solitary, but lions live in social groups called prides, with females doing the majority of the hunting.

Wolves can run up to 40 miles a day – Wolves are built for endurance and can travel long distances at high speeds while hunting for food or patrolling their territory.

Male seahorses give birth – In the seahorse species, it's the males that carry and give birth to the offspring, with some giving birth to hundreds of young at once.