Microsoft's new Turing Test

Microsoft Research has partnered with Petfinder.com to come up with a new test for determining whether there's a live human behind the keyboard or just a computer program. It's called Asirra, Animal Species Image Recognition for Restricting Access. The method presents twelve photographs of dogs and cats from Petfinder.com (each of which has an "adopt me" link associated with it) and asks the viewer to select all of the cats.