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Whale sharks are the largest species of sharks in the world. Their average size ranges from 18 to 32 feet, but they have been known to reach 40 feet long or more. Whale sharks can reach a weight of approximately 20 tons.


There are approximately 470 known species of shark in the world, but it's impossible to count the exact number of individual sharks on the planet. World Wildlife Fund estimates that more than 100 million sharks are killed each year for their fins.


As of 2014, the largest shark ever captured was a whale shark, measuring 12.6 metres and weighing an estimated 15.5 tons. It was captured in 1949 off the coast of Baba Island near Pakistan.


Of the 400 or so shark species on the planet, the shortfin mako shark is thought to be the fastest, capable of swimming at speeds from 22 to 60 miles per hour. Makos are aggressive, however attacks on humans are rare because the species usually stays in the open ocean.


According to the Alaska Department of Fish and Game, the Kodiak is the largest bear in the world. An adult male may stand more than 10 feet tall on his hind legs and weigh more than 1,500 pounds.


As of July 2014, the largest hammerhead shark ever caught weighed 1,280 pounds and measured 14 feet in length. The catch was made on the morning of May 23, 2006, by Clyde "Bucky" Dennis off the Gulf Coast of Florida.


The largest named number in the world is a googolplexian. Because numbers are infinite, and any number can be made larger by simply adding to it, the largest number in the world is defined as the largest number that has a name.