Acting as a "sender," brain researcher Rajesh Rao watches a video game and waits for the time to hit the "fire" button. But he'll only think about doing that — the impulse was carried out by someone in another building, in a recent test of brain-to-brain communication. University of Washington hide caption

itoggle caption University of Washington

This young whooping crane is on its first fall migration, guided by an Operation Migration ultralight aircraft. Each whooper in this population wears an identification band, and many carry tracking devices that record their movements in detail. Joe Duff/Operation Migration USA Inc. hide caption

itoggle caption Joe Duff/Operation Migration USA Inc.

A little chilly for camping: Ice-penetrating radar revealed a mega-canyon below the Greenland ice sheet, extending for more than 460 miles. Courtesy of J. Bamber/University of Bristol hide caption

itoggle caption Courtesy of J. Bamber/University of Bristol

The underlying biology of age-related memory glitches — in old mice and old people — is different from what happens with Alzheimer's, recent research suggests. Anthony Bradshaw/iStockphoto.com hide caption

itoggle caption Anthony Bradshaw/iStockphoto.com