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Human daredevils are addicted to adrenaline: the greater the risk - the bigger the rush. But some animals put their lives on the line every day; not for fun -- but survival. We're counting down the ultimate top ten animal adrenaline junkies to find who takes the biggest risks, leaving bodies bent, broken, or dead. From free-wheeling salamanders to BASE jumping barnacle geese; buckle up - it's going to be a wild ride on the Ultimate Animal Countdown.