Theorists and Experimenters Seek to Learn Why Gravity Is So Weak

At the recent Marcel Grossmann Meeting on General Relativity in Rome, Jens Gundlach of the University of Washington's Eot‐Wash laboratory reported a provisional result from the group's examination of gravity at submillimeter distances. At distances as small as 0.2 mm, he said, the group's specially designed torsion balance has not, as yet, revealed any departure from Newtonian $1/r2$ gravity.