National Geographic News: Snake Wranglers

National Geographic News:  Gaboon Viper
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Do all snakes lay eggs?

No. Only 70 percent of the world's snakes lay eggs. The rest give birth to live young. Oviparous—or egg-laying—snakes tend to live in warmer climates, which helps incubate their eggs. Viviparous—or live-birthing—snakes tend to live in cooler regions, where the ground is too cold for the eggs to develop on their own.

The Boas of Belize
Premieres Wednesday, February 5, 2003 at 8 p.m. ET/PT on the National Geographic Channel
Travel to Belize to visit six-foot boa constrictorsand their much, much larger cousins.

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—Photograph copyright Anthony Bannister, Gallo Images/CORBIS
 
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