Ringling Bros. Circus is back, but the only 'animal' performer is a robot dog

In an age where artificial intelligence is being promoted as the next big thing, we're incessantly told about how robots will soon replace humans and everyone will be out of a job.That hasn't happened quite yet.With one exception – circus animals.This year, Ringling Bros. and Barnum & Bailey Circus has returned, and is touring for the first time since closing seven years ago. But, this isn't the Ringling Bros. you may remember from when you were a kid. There are no more horses, zero ti