More fun animal facts

More fun animal facts:

• Rats breed so quickly that in just 18 months, 2 rats could have created over 1 million relatives.
• The blue whale can produce the loudest sound of any animal. At 188 decibels, the noise can be detected over 800 kilometres away.
• Horses and cows sleep while standing up.
• Giant Arctic jellyfish have tentacles that can reach over 36 metres in length.
• Locusts have leg muscles that are about 1000 times more powerful than an equal weight of human muscle.
• Hummingbirds are so agile and have such good control that they can fly backwards.
• Instead of bones, sharks have a skeleton made from cartilage.
• Insects such as bees, mosquitoes and cicadas make noise by rapidly moving their wings.
• The horn of a rhinoceros is made from compacted hair rather than bone or another substance.
• Sharks lay the biggest eggs in the world.
• Even when a snake has its eyes closed, it can still see through its eyelids.
• Unlike humans, sheep have four stomachs, each one helps them digest the food they eat.
• Despite the white, fluffy appearance of Polar Bears fur, it actually has black skin.
• The average housefly only lives for 2 or 3 weeks.
• Mosquitoes can be annoying insects but did you know that it's only the female mosquito that actually bites humans.
• Cats use their whiskers to check whether a space is too small for them to fit through or not.