I'm here at the 2011 BioBlitz in Tucson, Arizona, presented by the National Geographic Society and the National Park Service. It's a 24-hour species inventory, held this year in Saguaro National Park. This is a great event for getting kids interested in geography content, including how different geographic areas result in different ecosystems, as a result of climate, terrain, soil chemistry and a host of other factors. This first video is an overview of the event. I'll be posting more tonight and tomorrow.