Snakes did not acquire their poison for use against man but for use against prey such as rats and mice, and the effects on these of viperine poison is almost immediate.

蛇产生毒液不是用来对付人类的，而是用于捕食老鼠耗子之类的猎物的，毒蛇的毒液几乎能立即毒死这些小动物。

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This, however, means nothing. Snakes did not acquire their poison for use against man but for use against prey such as rats and mice, and the effects on these of viperine poison is almost immediate.

但是，这没有什么关系，因为蛇有毒液不是用来对付人的，而是对付它的猎物，诸如鼠类，毒液对这些猎物会立刻起作用。

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More than four million people around the world are bitten by snakes each year. At least one hundred twenty-five thousand of these people die. Almost three million others are seriously injured.

全球每年有四百万的人被蛇咬伤，至少12 万5 千人死于蛇咬伤，三百万人严重受伤。

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Researchers speculate that 2 to 8 new cetacean species and almost 10 marine reptile species (like sea snakes) remain to be discovered.

UNESCO: THEMES

"Snakes will rarely strike a flagging adult squirrel, and if they do they almost always miss, " said Rulon Clark, assistant professor of biology at San Diego State University.

CNN: April 4, 2012 -- Updated 1350 GMT (2150 HKT)

What at first glance appears to be a jumble of boulders was probably a workshop where expert stonecutters practiced their trade. (One chunk of granite has been carved into almost-finished steps.) Another large stone, known as Serpent Rock, has snakes etched into its top surface.

BBC: What most people miss at Machu Picchu