A new "calorimeter," shown immersed in this water bath, provides the first inexpensive means of identifying the hallmark of cold fusion reactions: the production of excess heat. Credit: Melvin Miles
A potential new energy source so controversial that people once regarded it as junk science is moving closer to acceptance by the mainstream scientific community. That's the conclusion of the organizer of one of the largest scientific sessions on the topic -- "cold fusion" -- being held in San Francisco for the next two days in the Moscone Center during the 239th National Meeting of the American Chemical Society (ACS).