Fastest dog

The fastest dog, the greyhound, can reach speeds of upto 41.7 miles per hour. The breed was known to exist in ancient Egypt 6,000 years ago.

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Loudest sound

At 188 decibels, the whistle of the blue whale is the loudest sound produced by any animal.

Blue whale's weight

The world's largest mammal, the blue whale, weighs 50 tons at birth. Fully grown, it weighs as much as 150 tons. The heart of a blue whale is as big as a car, and it's tongue is as long as an elephant.

Cow's Milk

A cow gives nearly 200,000 glasses of milk in her lifetime.

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