1 â€“ The speed of light is generally rounded down to 186,000 miles per second. In exact terms it is 299,792,458 m/s (equal to 186,287.49 miles per second).
2 â€“ It takes 8 minutes 17 seconds for light to travel from the Sunâ€™s surface to the Earth.
3 â€“ 10 percent of all human beings ever born are alive at this very moment.
4 â€“ The Earth spins at 1,000 mph but it travels through space at an incredible 67,000 mph.
5 â€“ Every year, over one million earthquakes shake the Earth.
6 â€“ When Krakatoa erupted in 1883, its force was so great it could be heard 4,800 kilometers away in Australia.
7 â€“ Every second around 100 lightning bolts strike the Earth.
8 â€“ Every year lightning kills 1000 people.
9 â€“ In October 1999 an Iceberg the size of London broke free from the Antarctic ice shelf .
10 â€“ If you could drive your car straight up you would arrive in space in just over an hour.
11 â€“ Human tapeworms can grow up to 22.9m.
12 â€“ The Earth is 4.56 billion years oldâ€¦the same age as the Moon and the Sun.
13 â€“ The dinosaurs became extinct before the Rockies or the Alps were formed.
14 â€“ Female black widow spiders eat their males after mating.
15 â€“ When a flea jumps, the rate of acceleration is 20 times that of the space shuttle during launch.
16 â€“ If our Sun were just inch in diameter, the nearest star would be 445 miles away.
17 â€“ Astronauts cannot belch â€“ there is no gravity to separate liquid from gas in their stomachs.
18 â€“ The air at the summit of Mount Everest, 29,029 feet is only a third as thick as the air at sea level.
19 â€“ One million, million, million, million, millionth of a second after the Big Bang the Universe was the size of a â€¦pea.
20 â€“ DNA was first discovered in 1869 by Swiss Friedrich Mieschler.
21 â€“ The molecular structure of DNA was first determined by Watson and Crick in 1953.
22 â€“ The first synthetic human chromosome was constructed by US scientists in 1997.
23 â€“ The thermometer was invented in 1607 by Galileo.
24 â€“ Alfred Nobel invented dynamite in 1866.
25 â€“ Wilhelm Rontgen won the first Nobel Prize for physics for discovering X-rays in 1895.
26 â€“ The tallest tree ever was an Australian eucalyptus â€“ In 1872 it was measured at 435 feet tall.
27 â€“ Christian Barnard performed the first heart transplant in 1967 â€“ the patient lived for 18 days.
28 â€“ An electric eel can produce a shock of up to 650 volts.
29 â€“ â€˜Wirelessâ€™ communications took a giant leap forward in 1962 with the launch of Telstar, the first satellite capable of relaying telephone and satellite TV signals.
30 â€“ The Ebola virus kills 4 out of every 5 humans it infects.
31 â€“ In 5 billion years the Sun will run out of fuel and turn into a Red Giant.
32 â€“ Giraffes often sleep for only 20 minutes in any 24 hours. They may sleep up to 2 hours (in spurts â€“ not all at once), but this is rare. They never lie down.
33 â€“ There are 60,000 miles of blood vessels in the human body.
34 â€“ An individual blood cell takes about 60 seconds to make a complete circuit of the body.
35 â€“ On the day that Alexander Graham Bell was buried the entire US telephone system was shut down for 1 minute in tribute.
36 â€“ The low frequency call of the humpback whale is the loudest noise made by a living creature.
37 â€“ A quarter of the worldâ€™s plants are threatened with extinction by the year 2010.
38 â€“ Each person sheds 40lbs of skin in his or her lifetime.
39 â€“ At 15 inches the eyes of giant squids are the largest on the planet.
40 â€“ The Universe contains over 100 billion galaxies.
41 â€“ Wounds infested with maggots heal quickly and without spread of gangrene or other infection.
42 â€“ More germs are transferred shaking hands than kissing.
43 â€“ The fastest speed a falling raindrop can hit you is 18mph.
44 â€“ It would take over an hour for a heavy object to sink 6.7 miles down to the deepest part of the ocean.
45 â€“ Around a million, billion neutrinos from the Sun will pass through your body while you read this sentence.
46 â€“ The deepest part of any ocean in the world is the Mariana trench in the Pacific with a depth of 35,797 feet.
47 â€“ Every hour the Universe expands by a billion miles in all directions.
48 â€“ Somewhere in the flicker of a badly tuned TV set is the background radiation from the Big Bang.
49 â€“ Even traveling at the speed of light it would take 2 million years to reach the nearest large galaxy, Andromeda.
50 â€“ A thimbleful of a neutron star would weigh over 100 million tons.