· Diamonds are the hardest substance known to man.
· Hydrogen is the most abundant element in the Universe (75%).
· The typewriter was invented in 1829, and the automatic dishwasher in 1889.
· No matter its size or thickness, no piece of paper can be folded in half more than 7 times.
· The only letter not appearing on the Periodic Table is the letter “J”.
· Hydrofluoric acid will dissolve glass.
· Sound travels about 4 times faster in water than in air.
· There are between 100,000,000,000 and 1,000,000,000,000 stars in a normal galaxy.
· The hottest planet in the solar system is Venus, with an estimated surface temperature of 864 F (462 C).
· The longest living cells in the body are brain cells which can live an entire lifetime.
· The Cerebrum, also called the forebrain, is responsible for our language, memory, movement and all. As you’re reading this and trying to understand it, you’re using your Cerebrum.
· Each carbon nucleus (containing six protons and six neutrons) is made up from three nuclei of helium.
· It was not until 1926 that Pneumatic tyres surpassed solid tyres in numbers used on vehicles.
· The normal energy used by our brain is 0.1 calories per minute, and could go up to 1.5 during activities such as puzzle-solving.
· The diamond is the mineral as found in nature. There is no known material of greater hardness on Earth, so in order to carve a diamond would have to use another diamond.
· The moon is a planet just like the earth, only it is even deader.
· The pistol of a flower is its only protections against insects.
· H2O is hot water, and CO2 is cold water
· Blood flows down one leg and up the other.
· Dew is formed on leaves when the sun shines down on them and makes them perspire
