Insects like this mantis have been fossilized for 50 to 52 million years in a deposit of amber excavated in India. David Grimaldi/AMNH hide caption

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Researchers say one reason physicists are good at poker is because their brains are particularly attuned to thinking about probability, statistics and modeling. Mikko J. Pitkanen/ hide caption

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Mark Evans/

Scientists exposed the brains of specially engineered lab mice to pulses of light and saw brain cells responding as if they were triggered by an odor. The research could be applied to diseases including Alzheimer's and Parkinson's. Eric Isselee/ hide caption

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