Female black widow spiders eat their males after mating.
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When a flea jumps, the rate of acceleration is 20 times that of the space shuttle during launch.
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If our Sun were just inch in diameter, the nearest star would be 445 miles away.
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Astronauts cannot belch there is no gravity to separate liquid from gas in their stomachs.
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The air at the summit of Mount Everest, 29,029 feet is only a third as thick as the air at sea level.
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One million, million, million, million, millionth of a second after the Big Bang the Universe was the size of a …pea.
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DNA was first discovered in 1869 by Swiss Friedrich Mieschler.
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The molecular structure of DNA was first determined by Watson and Crick in 1953.
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The first synthetic human chromosome was constructed by US scientists in 1997.
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The thermometer was invented in 1607 by Galileo.
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Alfred Nobel invented dynamite in 1866.
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Wilhelm Rontgen won the first Nobel Prize for physics for discovering X-rays in 1895.
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The tallest tree ever was an Australian eucalyptus In 1872 it was measured at 435 feet tall.
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Christian Barnard performed the first heart transplant in 1967 the patient lived for 18 days.
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An electric eel can produce a shock of up to 650 volts.
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‘Wireless’ communications took a giant leap forward in 1962 with the launch of Telstar, the first satellite capable of relaying telephone and satellite TV signals.
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The Ebola virus kills 4 out of every 5 humans it infects.
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In 5 billion years the Sun will run out of fuel and turn into a Red Giant.
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Giraffes often sleep for only 20 minutes in any 24 hours. They may sleep up to 2 hours (in spurts not all at once), but this is rare. They never lie down.