Leary Audio #7 Space Migration Lecture Star Trek Convention, Oakland, CA - August 1976 TRT: 47:27

Sagan's hour-long keynote tribute lecture at the Worlds of Philip Morrison Symposium (Day 2), surveying the Copernican perspective and Morrison's contributions to physics and SETI.

Speech at the 50th rededication of the Eternal Light Peace Memorial, on the escalation of weaponry from Gettysburg to nuclear arsenals and the case for reconciliation.

Sagan's lecture at Yale Peace Week on nuclear war and nuclear winter, including the TTAPS findings and proposed nuclear-arsenal reduction milestones.

Sagan's first Royal Institution Christmas Lecture in the 1977 'Planets' series, broadcast on BBC2 in early 1978.