Every night, bats emerge out of roosts in massive numbers, creating what scientists have called a 'cocktail party nightmare' of clashing echolocations. Nobody knew how bats managed this severe sensorial challenge. Now, scientists have tracked bats within a group of thousands to find out: when bats f irst emerge from the roost, they increase their distance from the center of the group and adjust their echolocation to maneuver safely in the areas of highest bat density. ...read more read less