iqdigest

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 Cows don't have upper front teeth 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 ...