 The world's densest wood, the Black Ironwood (Olea laurifolia), does not float on water and therefore sinks. Submitted by: Sruthi R - | The mass of our entire atmosphere is estimated to be some 5.5 quadrillion tons (55 followed by 14 zeros). Submitted by: Sruthi R - |
Chewing gum was invented by a dentist, named William Semple - as a way to exercise your jaws. Submitted by: Bob | The diameter of a proton is approximately 0.000000000001 mm (1/25,000,000,000,000 inch). |
 You can convert graphite into diamond by applying a temperature of 3000 Celsius and pressure of 100,000 atm. Submitted by: Hyde | The amount of water beneath our ground soil is 50 times as much as all the water in the rivers and lakes combined. |
The first ten feet of the ocean hold as much heat as the Earth's entire atmosphere. |  The lightning bolt is 3 times hotter than the sun. Submitted by: Jieian - |
On average, our bodies constantly resist an atmospheric pressure of about 1 kilogram per square inch. |  The deepest location on Earth is Mariana Trench, about 11km deep in the North Pacific ocean. Submitted by: Apurv -
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 The bark of the redwood tree is fireproof. Submitted by: Hyde |  If Mount Everest were placed at the bottom of the deepest part of the ocean, its peak would still be a mile underwater. Submitted by: Nikhil, |
If given the same mass, our body would actually be hotter than the sun. Submitted by: Eddy - United States |  Many physicists believe wormholes (a "shortcut" through space and time) exist all around us but they are smaller than atoms. Submitted by: Jay - United States |
 A solar panel 100 miles by 100 miles (161x161km) in the Mojave Desert (USA) could replace all the coal now burned to generate electricity in the entire U.S. Submitted by: Jay - United States | The Atlantic Ocean grows at about the same rate as your fingernails. Submitted by: Do do bird - United States |
If you yelled for 8 years, 7 months and 6 days, you would have produced just enough sound energy to heat up one cup of coffee. Submitted by: me knows me facts, Canada | The average ice berg weighs 20,000,000 tons. |
Lightning strikes about 6,000 times per minute on our planet. | A gallon of water weighs 8.34 pounds (3.8kg). |
If an item moves very, very fast, it becomes smaller and heavier. | Minus 40 degrees Celsius is exactly the same temperature as minus 40 degrees Fahrenheit. |
Hot water freezes quicker than cold water. | The only rock that floats in water is pumice. |
Mexico City is sinking at a rate of 18 inches (46cm) per year as a result of draining water. | 1 inch (25mm) of rain water is equivalent to 15 inches (381mm) of dry, powdery snow. |
 The oldest and largest clearly visible meteorite crater site in the world is The Vredefort Dome in Free State, South Africa. It is 380km across. | The greatest tide change on earth occurs in the Bay of Fundy. The difference between low tide and high tide can be as great as 16.6 meters (54 ft.) |
The temperature in fahrenheit can be determined by counting the number of cricket chirps in 14 seconds and adding 40. | The average ocean floor is about 3,600 meters deep (12000ft). |
Sunlight can penetrate clean ocean water to a depth of 73 meters (240ft.) | The North Atlantic gets 2.5 centimetres (1in) wider every year. |
Hawaii is moving toward Japan 10 centimetres (4 inches) every year. | Due to gravitational effects, you weigh slightly less when the moon is directly overhead. |
Lake Baikal is the deepest lake in the world. | When hydrogen burns in the air, water is formed. |
Diamonds are the hardest known substance. | Most gemstones contain several elements, except diamond which is all carbon. |
When glass breaks, the cracks move at speeds of more than 4,500 km/h (3,000 miles). | If you could throw a snowball fast enough, it would totally vaporize when it hit a brick wall. |
