Here's a new excuse for your insurance company next time you're in a fender bender: It's a parasite's fault.

Czech Republic researchers say that people who lack a particular protein in their blood cells and are infected with a common parasite called Toxoplasma have slower reaction times.

In rats, the natural host of Toxoplasma, the parasite infects the brain, altering the rodent's behavior so it becomes more reckless and more likely to be eaten by a cat, who then passes along th ...

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