Volume 18, number 3
If Worlds Collide
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(Planetary Society members only)
4 Opinion: The Green Space Project: To many of us, an alliance of our forces with those of the environmental movement has seemed a natural thing to create. But not everyone feels that way. Noted science fiction author and Planetary Society member Kim Stanley Robinson explores this dilemma.
6 Deep Space 1: Exploration Technology for the 21st Century: Robert M. Nelson and Marc D. Rayman report on this mission, which will test the effectiveness of NASA's new and unofficial motto "faster, better, cheaper."
9 The Mars Rock: Some of its Chemistry is From Earth: In August 1996 the announcement that scientists from NASA and Stanford University had found possible traces of ancient life on Mars touched off a flurry of experimentation and controversy. Gene McDonald reports on two recent studies that question the original findings.
10 Earthly Contaminants Don't Rule Out Martian Life: Members of the team that found the putative traces of ancient life on Mars—David S. McKay, Everett K. Gibson, and Kathie L. Thomas-Keprta—believe that their argument has grown stronger over the past year and a half. Here they counter the recent studies questioning their evidence and its interpretation.
12 Deep Impact: Filming a Cosmic Catastrophe: We don't usually report on films, but Deep Impact explores some of the topics we cover regularly. When we were given the opportunity to review the script, we decided to share our analysis of the producers' efforts with Planetary Society members. Charlene Anderson reports here.
3 Members' Dialogue Shiva impact; comments on the metric system.
16 The Stuff of Life Christopher Chyba looks at why water is necessary.
18 News & Reviews Near-Earth objects (NEOs).
19 World Watch Lunar and Martian mission updates.
20 Q&A Questions about extraterrestrial intelligence.
22 Society News Mars Microphone, new NEO website, and Pathfinder on the BBC.