About 400 billion gallons water is used worldwide eachday The Persian Gulf is the warmest sea. In the summer its temperature reaches 35.6 degrees centigrade. The moon is one million times drier than the Gobi Desert Earth travels through space at 66,700 miles per hour Groundwater comprises a 30 times greater volume than allfreshwater lakes, and more than 3,000 times what's in the world's streams and rivers at any given time. From a distance, Earth would be the brightest of the 9 planets. This is because sunlight is reflected by the planet's water. The total surface area of theEarth is 197 million square miles. Only 3% water of the earth isfresh, rest 97% salted. Of that 3%, over 2% is frozen inice sheets and glaciers. Means less than 1% fresh water is found in lakes, rivers and underground. Asia Continent is covered 30% of the total earth land area, but represent 60% of the world's population. About 540 volcanoes on land are known. No one knows how many undersea volcanoes have erupted through history. Rain has never been recorded in some parts of the Atacama Desert in Chile. The Angel Falls in Venezuela is the world's highest waterfall (979 meters / 3212 ft.), three times the size of the Eiffel Tower The gravity on Mars is 38% of that found on Earth. So a 100 pounds person on Earth would weigh 38 pounds on Mars. The largest eggs in the worldare laid by a shark The hottest planet in the solar system is Venus, with an estimated surface temperature of 864 F (462 C). The Antarctic ice sheet is 3-4km thick, covers 13 million sqkm and has temperatures as low as -70 degrees centigrade Tibet is the highest country in the world. Its average height above sea level is 4500 meters. The temperature of Earth increases about 36 degrees Fahrenheit (20 degrees Celsius) for every kilometer (about 0.62 miles) you go down.