Facts of earth

We live on a sphere of extremes and oddities. In fact it's not really a sphere, but it is a wild planet, mottled with deadly volcanoes, rattled by killer earthquakes, drenched in disastrous deluges. But do you know which were the worst?

What is the hottest place on Earth?
Count one wrong if you guessed Death Valley in California . True enough on many days. But El Azizia in Libya recorded a temperature of 136 degrees Fahrenheit (57.8 Celsius) on Sept. 13, 1922 -- the hottest ever measured. In Death Valley , it got up to 134 Fahrenheit on July 10, 1913
And the coldest place around here?
Far and away, the coldest temperature ever measured on Earth was -129 Fahrenheit (-89 Celsius) at Vostok, Antarctica , on July 21, 1983 .
What makes thunder?
If you thought, "Lightning!" then hats off to you. But I had a more illuminating answer in mind. The air around a lightning bolt is superheated to about five times the temperature of the Sun . This sudden heating causes the air to expand faster than the speed of sound, which compresses the air and forms a shock wave; we hear it as thunder.
Where is the worlds highest waterfall?
The water of Angel Falls in Venezuela drops 3,212 feet (979 meters)
What would a 100-pound person weigh on Mars?
The gravity on Mars is 38 percent of that found on Earth at sea level. So a 100-pound person on Earth would weigh 38 pounds on Mars.
How far is it to the center of the Earth?
The distance from the surface of Earth to the center is about 3,963 miles (6,378 kilometers).
What is the longest river?
The Nile River in Africa is 4,160 miles (6,695 kilometers) long
Which of the Earth's oceans is the largest?
The Pacific Ocean covers 64 million square miles (165 million square kilometers). It is more than two times the size of the Atlantic . It has an average depth of 2.4 miles (3.9 kilometers).
How much surface area does Earth contain?
There are 196,950,711 square miles (510,100,000 square kilometers).
What is the largest lake in the world?
By size and volume it is the Caspian Sea , located between southeast Europe and west Asia
How old is Earth?
Our planet is more than 4.5 billion years old, just a shade younger than the Sun. Recent evidence actually shows that Earth was formed much earlier than previously believed, just 10 million years after the birth of the Sun, a stellar event typically put at 4.6 billion years ago.