Elephants do not have sweat glands. This means they cannot perspire to keep cool. The thousands of tiny ridges and grooves on the elephant's thick skin are not old-age wrinkles. When an elephant rolls in mud or sprays itself with water, these wrinkles trap the water. This helps to keep the elephant cool.
With their large surface area the elephant's big ears act as radiators, allowing heat to be transferred from the hot body to the surroundings. The network of blood vessels brings the warm blood close to the surface of these natural radiators, where the blood is air-cooled as it circulates.
Elephant babies carry their unborn babies for 22months - longer than any other mammal.
An Indian baby elephant weighs almost 100kg. when it is born.
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