A field guide to the surprising mental abilities of the most common animals living among us.
They're good at manipulating touch screens to get food rewards, for instance.
Democracy in America
Also, a Canadian city goes after bullies and a Chicago alderman takes the war on pigeons to a new level.
It's like a bird mated with a rainbow.
London's most athletic vermin run the torch in this charming animation.
A wildlife expert and Smithsonian scientist help solve one of life's enduring urban mysteries.