July 2005

How Nature Builds a Planet

A new space telescope tells us we really had no idea what was going on out there.

by Adam Frank

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July

Departments

Discover Dialogue: Planetary Geologist H. Jay Melosh

Just about every atom on Earth has been through a hypervelocity impact.
by Kathy A. Svitil

Letter From Discover

Letters

Contributors

X

by Susan Kruglinski

Bogglers Solutions

Bogglers

by Scott Kim

Reviews

Sky Lights

Stargazers can't fight summer's high humidity, but they can learn to love it
by Bob Berman

Vital Signs

Appendicitis? Or something else?
by Tony Dajer

The Physics of . . . Waterslides

When waterslides reach a certain speed, no scientist can predict their behavior
by Elizabeth Svoboda