- Age: 4.5 billion years old. Fossil records show that life began on Earth at least 3.5 billion years ago.
- Human Population: 6,820,000,000 (6.82 billion) as of May 2010
- All of the Earth's continents are wider at the north than in the south - and nobody knows why.
- An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards!
- The Pacific Ocean is one of the largest features on the face of the Earth, with an area of more than 181 million square kilometers (approximately 70 million sq mi.) It contains half of the world's water.
- Australia's Great Barrier Reef is 1,250 miles long!
- Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
- Approximately 115 tons of ocean salt spray enters the earth's atmosphere each second.
- Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
- The Earth gets 100 tons heavier every day due to falling space dust.
- The earth is .02 degrees hotter during a full moon.
- The highest point in Pennsylvania is lower than the lowest point in Colorado.
- The earth rotates more slowly on its axis in March than in September.
- The temperature of the earth's interior increases by 1 degree every 60 feet down.
- The population of the Earth has more than doubled since 1950.
- The Earth's atmosphere weighs about 5.5 quadrillion tons.
- The Earth is one of nine planets orbiting the sun. Remember the order of the planets with this nonsense line: My Very Eager Mother Just Served Us Nine Pizzas. The capital letters stand for the order of the planets, starting closest to the sun: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto. The orbits of the planets are nearly circular (eliptical) paths around the Sun. If Pluto's path were the size of a dinner plate, the orbits of the four inner planets would fit inside a pea sitting at the center of the plate.
- The Earth is not actually round in shape; in fact it is geoid. This simply means that the rounded shape has a slight bulge towards the equator.
- Gravity is what keeps all living beings alive and prevents them from falling off the Planet Earth as it completes its rotation.
- Earth is the only planet whose name has not been derived from the Roman or Greek mythology? The name has originated from the 8th century Anglo Saxon word- Erda. This means ground or soil.
- Sunlight can penetrate clean ocean water to a depth of 240 feet.
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