Number 370 (Story #4), May 6, 1998 by Phillip F. Schewe and Ben Stein CORRECTION: The best artificial vacuum was reported in the original version of Update 369 as corresponding to a spacing between residual atoms of about 1 mm. Several labs have done better: Gerald Gabrielse of Harvard, for example, achieves a vacuum of 5 x 10-17 torr, corresponding to about 2 atoms per cm3.