• It takes glass one million years to decompose, which means it never wears out and can be recycled an infinite amount of times!
• Gold is the only metal that doesn't rust, even if it's buried in the ground for thousands of years .
• Your tongue is the only muscle in your body that is attached at only one end .
• If you stop getting thirsty, you need to drink more water. When a human body is dehydrated, its thirst mechanism shuts off.
• Zero is the only number that cannot be represented by Roman numerals.
• Kites were used in the American Civil War to deliver letters and newspapers.
• The song, Auld Lang Syne, is sung at the stroke of midnight in almost every English-speaking country in the world to bring in the new year.
• Drinking water after eating reduces the acid in your mouth by 61 percent.
• Peanut oil is used for cooking in submarines because it doesn't smoke unless it's heated above 450F.
• The roar that we hear when we place a seashell next to our ear is not the ocean, but rather the sound of blood surging through the veins in the ear.
• Nine out of every 10 living things live in the ocean.
• The banana cannot reproduce itself. It can be propagated only by the hand of man.
• Airports at higher altitudes require a longer airstrip due to lower air density.
• The University of Alaska spans four time zones.
• The tooth is the only part of the human body that cannot heal itself.
• In ancient Greece , tossing an apple to a girl was a traditional proposal of marriage. Catching it meant she accepted.
• Warner Communications paid $28 million for the copyright to the song Happy Birthday.
• Intelligent people have more zinc and copper in their hair.
• A comet's tail always points away from the sun.
• The Swine Flu vaccine in 1976 caused more death and illness than the disease it was intended to prevent.
• Caffeine increases the power of aspirin and other painkillers, that is why it is found in some medicines.
• The military salute is a motion that evolved from medieval times, when knights in armor raised their visors to reveal their identity.
• If you get into the bottom of a well or a tall chimney and look up, you can see stars, even in the middle of the day.
• When a person dies, hearing is the last sense to go. The first sense lost is sight.
• In ancient times strangers shook hands to show that they were unarmed.
• Strawberries are the only fruits whose seeds grow on the outside.
• Avocados have the highest calories of any fruit at 167 calories per hundred grams.
• The moon moves about two inches away from the Earth each year.
• The Earth gets 100 tons heavier every day due to falling space dust.
• Due to earth's gravity it is impossible for mountains to be higher than 15,000 meters.
• Mickey Mouse is known as "Topolino" in Italy .
• Soldiers do not march in step when going across bridges because they could set up a vibration which could be sufficient to knock the bridge down.