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18 Collision Course: Deep Impact
This month, an 816-pound spacecraft is scheduled to collide with Tempel 1, a comet 83 million miles away, which scientists hope will shed light on the formation of the solar system.
Lucy McFadden and Peter Schultz
22 Journey to a Titanic
Last January, a probe landed on Saturn's largest moon to explore its intriguing atmosphere and terrain.
28 Martian Views
Through pictures sent back to Earth, the martian rovers, Opportunity and Spirit, have much to tell of their year-and-a-half-long journey across the red planet.
30 Planet-Finder's Guide
to the Universe
New-generation telescopes and observing platforms are getting off Earth to find other Earth-like planets.
Peaking of World Oil Production: Is the Wolf Near?
Determining when the worlds oil is going to peak poses a unique challenge to petroleum geologists, economists and policy-makers, but the time to act is now.
Robert L. Hirsch, Roger H. Bezdek and Robert M. Wendling
8 NEWS NOTES
17 POLITICAL SCENE
40 TRENDS & INNOVATIONS
42 EDUCATION &
44 ENERGY & RESOURCES
July 4, 1997
60 GEOLOGIC COLUMN
4 From the Editor
6 Letters: Perspectives from readers
36 Where on Earth?
55 Classifieds: Career opportunities
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