Trust me: There's actually a tip at the end of this column, but it's going to take me awhile to get there. Be patient -- I do have a point and I am getting to it. When it comes to comparing objects, ...

Researchers from Japan have found that horseshoe bats exhibit rapid changes in vocalizations and behavior primarily in response to Doppler shifts. Unlike most animals that rely on visual senses, bats ...

Visual motion is an important source of information for separating objects from their backgrounds. A spider camouflaged against a branch, for instance, immediately loses its invisibility once it ...