Can't touch this: Unusual venomous creatures

Scientists study a cast of creatures to learn how to use toxins to treat pain and disease

By Sharon Pochron, 13:00 PM March 11, 2012

Even behind thick glass at the zoo, rattlesnakes look dangerous. Their coiled bodies remind you of lightning-fast strikes that can lead to pain and death. Australian funnel-web spiders in the next exhibit make your skin crawl too. Their deadly black fangs actually reflect the dim light. After you've passed black mamba snakes, brown recluse spiders and bark scorpions, all of the zoo’s dark corners seem treacherous.

Then you walk into the sunshine and visit the outdoor exhibits. You smile a...

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