The Invisible Gorilla by Christopher Chabris and Daniel Simons explores how we notice a lot less than we think we do. hide caption

itoggle caption

In the study, people who washed their hands after making a tough choice seemed less worried about it. iStockphoto.com hide caption

itoggle caption iStockphoto.com

Someone who looks like this could be in your family tree. Chip Clark/Courtesy of the Smithsonian Institution hide caption

itoggle caption Chip Clark/Courtesy of the Smithsonian Institution

The O. avoseta bee builds a tiny nest about a half-inch long using petals from the flower Onobrychis viciifolia. Each nest usually houses a single egg. Jerome Rozen/American Museum of Natural History hide caption

itoggle caption Jerome Rozen/American Museum of Natural History

Magritte's 1964 painting The Intimate Newspaper gets us thinking: Who is this? A familiar friend or a complete stranger? Rene Magritte/Corbis hide caption

itoggle caption Rene Magritte/Corbis