Strongest Animal(01 of13)
Open Image ModalThe Atlas beetle (pictured) can push around 850 times its weight. (credit:Scott Stockwell)
Largest Invertebrate (Land)(02 of13)
Open Image ModalThe coconut crab weighs about 6.6 pounds and its legs can span up to two and a half feet\r\n\r\nLiz Hall from the Melbourne Aquarium inspects Coconut Crab as he takes possesion of a coconut in Melbourne, 19 December 2006. They Coconut crab (also known as the Robber Crab) are the largest living crab in the world and can climb coconut trees to harvest coconuts which they can break with their huge nippers and have been gruesomely know to feed on injured or unconcious people in the bush. (William West, AFP / Getty Images) (credit:William West, AFP / Getty Images)
(03 of13)
Open Image ModalThe giant squid is the world\'s largest invertebrate, and the largest ever measured was 59 feet long. Giant squids also have the largest eyes of any animal, each one about the size of a human head.
Smallest Mammal(04 of13)
Open Image ModalThe etruscan shrew is the smallest mammal (by weight) in the world. The smallest animal by skull size is the bumblebee bat.
Most Venomous Animal(05 of13)
Open Image ModalThe sea wasp jellyfish (pictured) has enough venom to kill 60 adult humans.\r\nPhoto: Guido Gautsch/Flickr\r\n
Longest Migration(06 of13)
Open Image ModalArctic terns migrate about 11,000 miles to the Antarctic each year...and then come all the way back!\r\n\r\nAn Arctic Tern dives down to protect its nest on June 24, 2011 on Inner Farne, England. (Dan Kitwood, Getty Images) (credit:Dan Kitwood, Getty Images)
Loudest Animal(07 of13)
Open Image ModalBlue whales\' low-frequency pulses can be heard over 500 miles way. At 188 decibels, these sounds are louder than a jet engine. \r\n\r\nIn this picture taken on March 26, 2009, shows a blue whale swimming in the deep waters off the southern Sri Lankan town of Mirissa. (Ishara S. Kodikara, AFP / Getty Images) (credit:Ishara S. Kodikara, AFP / Getty Images)
World's Most Extreme Animals(08 of13)
Open Image ModalNorth African ostriches run up to 45 miles an hour, making them the fastest land bird. They are also the biggest, weighing up to 345 pounds.\r\n\r\nAn african ostrich eats at the Addo National Elephant Park, north of Port Elizabeth, on June 24, 2010. South Africa is hosting the 2010 FIFA World Cup. (Patrick Hertzog, AFP / Getty Images) (credit:Patrick Hertzog, AFP / Getty Images)
Fastest Bird(09 of13)
Open Image ModalPeregrine falcons dive toward their prey at over 200 mph.\r\n\r\nA young male Peregrine Falcon eats meat taken from the protective glove of Taronga Zoo bird trainer Erin Stone (unseen) following a short flying lesson in Sydney on December 9, 2009. (Greg Wood, AFP / Getty Images) (credit:Greg Wood, AFP / Getty Images)
Fastest Fish(10 of13)
Open Image ModalSailfish can swim at speeds of up to 68 mph, although experts disagree as to just which species of sailfish is the fastest. \r\n\r\nSailfish jumping out of the water on January 16, 2006 in the Florida Keys, Florida. (Ronald C. Modra, Sports Imagery / Getty Images) (credit:Ronald C. Modra, Sports Imagery / Getty Images)
Fastest Mammal(11 of13)
Open Image ModalCheetahs can run at speeds up to 70 mph.\r\n\r\nMajani, a 2-year-old male African cheetah, exhibits lighting speed Friday, March 19, 2004 while chasing a mechanical rabbit at the San Diego Zoo\'s Wild Animal Park as part of the Park\'s environmental enrichment program. (Ken Bohn, San Diego Zoo / AP) (credit:Ken Bohn, San Diego Zoo / AP)
Longest Lifespan(12 of13)
Open Image ModalThree giant tortoises are estimated to have lived over 175 years, with one estimated at a whopping 255 years. \r\n\r\nImage: Harriet, who died in 2006, was thought to be the third longest-lived tortoise on record.\r\nCory Doctorow/Creative Commons
World's Most Extreme Animals(13 of13)
Open Image ModalAfrican elephants are the heaviest and second tallest land animals. Large males can exceed 13,000 pounds and are 12 feet tall at the shoulder.\r\n\r\nThis photo made on February 10, 2011 shows an elephant in Tsavo west national park, some 350 kilometres southeast of Nairobi. (Tony Karumba, AFP / Getty Images) (credit:Tony Karumba, AFP / Getty Images)