WCommunication with extraterrestrial intelligenceWA Simple Response to an Elemental MessageWBracewell probeWBreakthrough ListenWCosmic CallWDrake equationWFrank DrakeWAnn DruyanWYvan DutilWExtraterrestrial lifeWHans FreudenthalWGauss's Pythagorean right triangle proposalWLone SignalWMessage in a bottleWMorse Message (1962)WNIROSETIWAlexander OllongrenWPioneer plaqueWCarl SaganWSearch for extraterrestrial intelligenceWIosif ShklovskyWTeen Age MessageWTime capsuleWDouglas VakochWVoyager Golden RecordWAlexander Zaitsev (astronomer)
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W
W