But Northwestern University researcher Bartosz Grzybowski led a study that appeared in Science last week that found things are not so black-and-white. His team's close examination of statically charged objects shows that both contain pockets of negative and positive charges. It is only the net total charge of each object that leads to their attraction. Furthermore, he found, static electricity is not caused solely by a migration of electrons or ions from one item to the other. In fact, Grzybowski says, static electricity may arise from a significant transfer of materials such as surface molecules.
Grzybowski admits it's bizarre to find a huge surprise in a topic that has been studied since Greek polymath Thales of Miletus first rubbed amber on wool in 600 B.C., and found it could then attract light objects like feathers. Leading lights such as Nikola Tesla and Michael Faraday have studied the phenomenon, but they too reached the same conclusion. "One assumption common to all these models is that one material was positively charged, and one negatively charged," Grzybowski says. "This is actually not true."
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