Basic Science Facts for kids

• Humans have 46 chromosomes, peas have 14 and crayfish have 200.
  
• Without its lining of mucus your stomach would digest itself.
  
• There are 60,000 miles of blood vessels in the human body.
  
• An individual blood cell takes about 60 seconds to make a complete circuit of the body.
  
• Utopia is a large, smooth lying area of Mars.
  
• A quarter of the world's plants are threatened with extinction by the year 2010.
  
• Each person sheds 40lbs of skin in his or her lifetime.
  
• At 15 inches the eyes of giant squids are the largest on the planet.
  
• The largest galaxies contain up to 400 billion stars.
  
• The Universe contains over 100 billion galaxies.
  
• Wounds infested with maggots heal quickly and without spread of gangrene or other infection.
  
• More germs are transferred shaking hands than kissing.
  
• The fastest speed a falling raindrop can hit you is 18mph.
  
• A healthy person has 6,000 million, million, million hemoglobin molecules.
  
• At over 2000 kilometers long The Great Barrier Reef is the largest living structure on Earth.
  
• A thimbleful of a neutron star would weigh over 100 million tons.
  
• The deepest part of any ocean in the world is the Mariana trench in the Pacific with a depth of 35,797 feet.
  
• The largest dinosaur ever discovered was Seismosaurus who was over 100 feet long and weighed up to 80 tonnes.
  
• The African Elephant gestates for 22 months.
  
• The short-nosed Bandicoot has a gestation period of only 12 days.
  
• The mortality rate if bitten by a Black Mamba snake is over 95%.
  
• In the 14th century the Black Death killed 75,000,000 people. It was carried by fleas on the black rat.
  
• A dog's sense of smell is 1,000 times more sensitive than a humans.
  
• A typical hurricane produces the energy equivalent to 8,000 one megaton bombs.
  
• To escape the Earth's gravity a rocket need to travel at 7 miles a second.
  
• If every star in the Milky Way was a grain of salt they would fill an Olympic sized swimming pool.
  
• Tuberculosis is the biggest global killer of women.
  
• One third of Asian women are infected with TB.
  
• Each domestic cow emits about 105 pounds of methane a year.
  
• Hummingbirds consume half of their body weight in food every day.
  
• The larva of the polyphemus moth consumes 86,000 times its birth weight in its first 56 days.
  
• Scientists have discovered over 20 planets outside our solar system.
  
• Organisms can live in temperatures up to 133 centigrade.
  
• NASA missions in 2003 and 2005 will collect rocks from Mars.
  
• The Sun takes about 220 million years to make one revolution of the Milky Way.
  
• A human heart beats 100,000 times a day.
  
• Every heartbeat pumps 1/15th of a pint of blood.
  
• The first bicycle was manufactured in 1817.
  
• A cockroach can live for nine days without its head.
  
• The biggest shark species has the smallest teeth. The 12 meter long whale shark has more than 4,000 teeth, each only 3mm long.
  
• The female lion is a much more efficient hunter than the male.
  
• The lightest baby to survive weighed a mere 283 grams.
  
• More babies are born at night than in the day.
  
• The average weight of the male brain is 1.4 kilos: 1.25 for females.
  
• 65% of those suffering autism are left handed.
  
• Apart from humans the only land animal that cries is the elephant.
  
• On average women say 7,000 words per day. Men manage just over 2000.
  
• The human brain is 2% of the body's weight but uses a hungry 20% of its energy.
  
• Alcohol lowers the level of the sex hormone testosterone in men but increases it in women.
  
• Polar Bears can run at 25 miles an hour and jump over 6 feet in the air.
  
• The silkworm moth has eleven brains.
  
• Polar Bears cannot be detected by infrared cameras, due to their transparent fur.
  
• The biggest star has a diameter of 1800 million miles, making it 2000 times bigger than the Sun.
  
• Young giraffes can grow an inch a month.
  
• Desert rats can copulate 122 times an hour.
  
• There are more than 1000 chemicals in every cup of coffee.
  
• Windows 2000' contained 29 million lines of code.
  
• If you are bitten by a mosquito, it's usually a female sucking blood from her victim to get nutrients for making her eggs.
  
• The largest group of insects are the beetles with over 400,000 different species.
  
• Dragonflies have the largest eyes and sharpest eyesight of any insect... each eye is made up of more than 30,000 separate rod-like units.
  

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