81. Zero is the only number that cannot be represented by Roman numerals.
82. The military salute is a motion that evolved from medieval times, when knights in armor raised their visors to reveal their identity.
83. Due to earth's gravity it is impossible for mountains to be higher than 15,000 meters.
84. Strawberries are the only fruits whose seeds grow on the outside.
85. The moon moves about two inches away from the Earth each year.
86. Caffeine increases the power of aspirin and other painkillers; that is why it is found in some medicines.
87. For every extra kilogram carried on a space flight, 530 kg of excess fuel are needed at lift-off.
88. Nine out of every 10 living things live in the ocean.
89. The banana cannot reproduce itself. It can be propagated only by the hand of man.
90. If you stop getting thirsty, you need to drink more water. When a human body is dehydrated, its thirst mechanism shuts off.
91. 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.
92. Glass takes one million years to decompose, which means it never wears out and can be a recycled an infinite amount of times!
93. Your tongue is the only muscle in your body that is attached at only one end.
94. Gold is the only metal that doesn't rust, even if it's buried in the ground for thousands of years.
95. The Swine Flu vaccine in 1976 caused more death and illness than the disease it prevented.
96. Peanut oil is used for cooking in submarines because it doesn't smoke unless it's heated above 450F.