In response to the flurry of press that Fred Gilbert, President of Canada's Lakehead University, got a couple of weeks back when he banned all Wi-Fi on campus because he feared the radio waves might cause cancer, experts at the University of Wisconsin-Madison are expressing their views in favor of Wi-Fi.

"I think the probability of that is nil," says Kelly Clifton, Professor Emeritus of Human Oncology in UW-Madison's medical school. "The wavelength of the wireless transmission makes it very unlikely to transfer energy to living material."

"Until you get up to exposures that are long enough to make warmth, electromagnetic energy cannot transfer to humans," Clifton says. "And you've got to get a horrendous dose to warm anything with microwaves."