Some dogs are highly adept not only at retrieving but also at catching in midair a tossed ball or Frisbee. To do so requires the dog to be in the right place at the right time. How does a dog navigate to snatch a Frisbee out of the air?
To find out, researchers attached a tiny video camera to the head of each of two dogs to capture what the dogs could see as they hunted, then intercepted Frisbees. They concluded that dogs appear to use the same geometric strategy that a baseball fielder employs to snag a fly ball hit into the outfield.