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the Chesapeake Bay Impact Crater
An extraterrestrial impact 36 million years ago left a lasting impression in the Chesapeake Bay and continues to affect the region's environment today.
C. Wylie Poag
26 The Many Faces of the Alamo Breccia
In Nevada, with no visible crater, researchers are piecing together evidence of a 370 million-year-old impact based on widely dispersed pieces of rock.
John E. Warme
30 Impacts in Space and on Earth: An Interview with Carolyn Shoemaker
Carolyn Shoemaker reflects on a lifetime of work with her husband Gene, uncovering impact structures around the world.
Lisa M. Pinsker
Although the near-term risk of a catastrophic asteroid collision on Earth may be slim, scientists acting now can provide insurance to protect future generations.
Richard P. Binzel
6 NEWS NOTES
13 POLITICAL SCENE
14 EDUCATION &
38 ENERGY & RESOURCES
56 GEOLOGIC COLUMN
2 From the Editor
4 Letters: Perspectives from readers
32 Where on Earth?
37 Benchmarks: Looking back in Geotimes
40 Geomedia: Life on a Young Planet
45 Classified Ads: Career Opportunities
55 Contributors Page
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Research out of the ashes, p.34