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

itoggle caption David Grimaldi/AMNH

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/iStockphoto.com hide caption

itoggle caption Mikko J. Pitkanen/iStockphoto.com

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/iStockphoto.com hide caption

itoggle caption Eric Isselee/iStockphoto.com