Comparison of planetary atmospheres : Mars, Venus, and Earth / Michael McElroy -- Cosmochemical evolution and the origins of life / Cyril Ponnamperuma -- Origin of life : polymers before monomers? / Clifford Matthews -- Origins of membrane structure / David Deamer -- Origins of life : the historical development of recent theories / Antonio Lazcano -- The antiquity of life / Elso S. Barghoorn -- Evidence of earliest life / Paul Strother -- Microbial mats of Abu Dhabi ; Stromatolites of Shark Bay / Stjepko Golubic -- Symbiosis theory : cells as microbial communities ; Spirochetes and the origin of Undulipodia / Lynn Margulis -- Life in the late proterozoic / Andrew Knoll -- Continental drift and plate tectonics / Raymond Siever.

Chemical signals from plants and phanerozoic evolution / Tony Swain. Questions and answers / Robert Buchsbaum -- Mammalian evolution : karyotypic fission theory / Neil Todd -- The Gaia hypothesis / James E. Lovelock.