HUMAN BODY
Your mouth produces 1 litre (1.8 pints) of saliva a day.
On average, people can hold their breath for one minute. The world record is seven-and-a-half minutes.
The human head contains 22 bones. More on the head and brains
Our eyes are always the same size from birth.
Babies start dreaming even before they're born
On average, you breathe 23,000 times a day.
On average, you speak almost 5,000 words a day - although almost 80% of speaking is self-talk (talking to yourself).
Einstein's brain was of average size (1375 grams - 49oz).
The muscle that lets your eye blink is the fastest muscle in your body. It allows you to blink 5 times a second. On average, you blink 15000 times a day. Women blink twice as much as men.
COWS
Although a cow has no upper front teeth, it grazes up to 8 hours a day, taking in about 45 kg (100 lb) of feed and the equivalent of a bath tub full of water. A healthy cow gives about 200,000 glasses of milk in her lifetime.
A cow has four stomachs:
the rumen,
reticulum,
omasum and
abomasum.
The rumen is the largest stomach and acts as a fermentation chamber. The abomasum is last of the four and is comparable in both structure and function to the human stomach.
With all its grazing and many stomachs, it is no wonder that cows are one of the main contributors to the hole in the ozone layer. Apart from CFC, the biggest culprit is hydrocarbon emissions from cars and cows. Yes, cows! Cows release some 100 million tons of hydrocarbon annually - by releasing gas. To give you an idea of how much gas a cow emits: if the gas of 10 cows could be captured, it would provide heating for a small house for a year.
But unlike what you think, cows release hydrocarbon mostly by burping.
The average lifespan of a cow is 7 years. The oldest cow ever recorded was Big Bertha. She reached 48 in 1993. She also holds the record for producing 39 calves.
There are more than a billion cattle in the world, about 200 million in India.
Twelve cows are known as a "flink."
ISLAND
One in ten people live on an island
The smallest island in the world - according to the Guiness Book of Records - is Bishop Rock. It lies at the most south-westerly part of the United Kingdom.
The largest island in the world is Greenland.
EGGS
Fresh egg sinks in water, stale one won't.
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