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Why do we have animal phobias - and why spiders?

Why do we still fear animals that pose no serious threat to us and why are so many people are afraid of spiders? Neuroscientist Dr Dean Burnett and American psychologist Joshua New explain how we are hard-wired to fear things that have caused us to have an emotional response in the past, helped by Why Factor presenter Mike Williams.

Image: Woman with spider Credit: Thinkstock

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Duration:

4 minutes