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- 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 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 one would have to use another diamond.
- The pistil of a flower is its only protections against insects.
- 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.
