19 November 2009
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Q.How much does the sea weigh?!
A.Combined, the world's oceans and seas contain 328,000,000 cubic miles of salt water, which weighs around 1.4 million trillion metric tons.
Q.What is the estimated collective weight of all humans on earth and is there any single species that is collectively heavier?
A.Antarctic krill make up the largest biomass of any animal species on Earth, at 500 million tons. Humans are a comparatively puny 100 million tons.
Q.What is the world heaviest object
A.The heaviest free-standing object on earth is the Great Pyramid of Giza, with an estimated weight of 6 million tons. The pyramid was built around 2560BC.
Q.What are the chances of a meteorite hitting the earth
A.Meteorites hit the earth almost every day. There is an extremely small chance that a 1.2 km wide asteroid, "2003 QQ47", will hit the earth in 2014.
Q.Which is bigger the blue or sperm whale? And is it the biggest whale and how big is it?
A.The largest animal on Earth is the blue whale. It can measure up to 100ft and weigh 150 tons. Sperm whales can be up to 90ft long and weigh 150 tons.