Even Charles Darwin was puzzled by the evolution of the vertebrate eye. New research suggests that it traces back to a cyclopean invertebrate with a single eye atop the head. By Carl Zimmer Look at ...

Add Yahoo as a preferred source to see more of our stories on Google. A photo released by the FBI of a person captured by Nancy Guthrie's doorbell camera, and Savannah Guthrie and Nancy Guthrie on the ...