Deborah Gordon: How do ants know what to do?

http://www.ted.com Armed with a backhoe and a handful of markers, Deborah Gordon studies ant colonies in the Arizona desert. She asks: How do these chitinous creatures get down to business -- and even multitask when they need to -- with no language, memory or visible leadership? Her answers could lead to a better understanding of all complex systems, from the brain to the Web.