June 2004

What Came Before DNA?

Scientists may soon reveal how life began on Earth—by creating a primordial organism in the lab

by Carl Zimmer

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June

Departments

Letter From Discover

Letters

Contributors

Bogglers Solutions

Observer

Ups and Downs
by Tony McNicol, Photography by Hans Sautter

Bogglers

Everything and More
by Scott Kim

Reviews

Sky Lights

This month Earth's closest neighbor makes a rare trek across the solar disk
by Bob Berman

Vital Signs

Why can't this woman breathe?
by Tony Dajer

The Physics of . . . Ice Cream

Scientists revolutionize one of the world's most complex foods
by Robert Kunzig

Emerging Technology

Digital environmentalists devise a clever strategy for bankrupting junk mail purveyors
by Steven Johnson

Discover Dialogue: Planetary Scientist Steve Squyres

What the team here at the Jet Propulsion Lab pulled off was magical.
by Kathy A. Svitil