Donald E. Brownlee Professions : Professor Born : December 21, 1943 Browse All Authors Top 3 quotes by Donald E. Brownlee We've undergone a very heavy level of scrutiny by review boards because of Genesis and because of the Columbia accident. . . . It was a cultural shift in NASA, that you're now required to understand all the risks. Donald E. Brownlee boards risk levels There's almost no gravity at the surface. If you were standing on [the surface], you could jump into orbit. Donald E. Brownlee orbit gravity surface So far, as far as we know comet Wild 2 is a unique object. Donald E. Brownlee objects unique knows Similar Authors Bryan Stevenson professor Bruce Greenwald professor Bruce Ames professor Brian Wansink professor Brian Schmidt professor Brian Martin professor All Authors