A cat's tongue consists of small "hooks" also known as papillae.
The cheetah is the fastest of all land animals, being able to reach speeds of up to 68 mph (110km/h).
Lions have loudest roar of any cat, which can be heard up to five miles away. They are the only big cat to live in large groups.
The South American Pudu deer is the smallest deer in the world. It measures 60 to 80 cm (23-31 inches) long. It's the only deer that can climb the trees.
All scorpions glow under UV light. The Emperor Scorpion in West Africa glows blue or green. UV lights are perfect for finding scorpions in a home.
An ostrich egg equals 24 chicken eggs, and can feed 12 people breakfast. They weigh about 3 pounds (1.4kg).
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