Researchers have made a very small research tool that may one day help scientists probe the activity of genes and proteins in a single cell, opening the door to a new realm of genetic research. "We have made little chips that are like the gene chips but instead of being lab scale they are molecular scale," says Stuart Lindsay, physics professor. "They have the potential to be used all the way down into analyzing single cells," he says. Editor's Note: Links are included for informational purposes only. Due to varying editorial policies, news publications may remove or change a link for archival purposes at any time without notice.