Biologists are relocating species such as this juvenile Mojave Desert tortoise due to the planned construction of BrightSource Energy's solar plant in southern California. Sarah McBride for NPR hide caption

itoggle caption Sarah McBride for NPR

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

A study finds that more than 800 species of vertebrates are moving closer to extinction, a fate that befell the golden toad. U.S. Fish and Wildlife Service via Wikimedia Commons hide caption

itoggle caption U.S. Fish and Wildlife Service via Wikimedia Commons

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