Harold E. Puthoff Professions : Physicist Born : June 20, 1936 Browse All Authors Famous Quotes by Harold E. Puthoff The possibility of reduced-time interstellar travel either by advanced extraterrestrial civilizations at present or ourselves in the future, is not fundamentally constrained by physical principles. Harold E. Puthoff possibility principles civilization Today the vacuum [of space] is not regarded as empty. It is a sea of dynamic energy, like the spray of foam near a turbulent waterfall. Harold E. Puthoff space energy sea Similar Authors Gabriel Lippmann physicist Burton Richter physicist Bruno Rossi physicist Bruce Maccabee physicist Brian Cox physicist Allan McLeod Cormack physicist All Authors