The Moon is a Harsh Witness

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Apollo 16 astronaut Charlie Duke (feet shown) drives a core sample tube into the lunar regolith.
Apollo 16 astronaut Charlie Duke (feet shown) drives a core sample tube into the lunar regolith.

With binoculars, examine the rugged face of the Moon. It is pocked with thousands of impact craters from interplanetary asteroids and comets. Ever wonder why Earth, a much bigger target, apparently has so few craters? They're so rare that a pristine example, the Barringer Meteor Crater in Arizona, is actually a tourist attraction. Did Earth just get lucky and dodge the heavy artillery?


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All News summaries for January 26, 2007

Researchers document world's mammals in crisis

45 minutes ago | User rating: not rated yet
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Oct 05, 2008 | User rating: not rated yet
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Oct 05, 2008 | User rating: not rated yet
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AP Investigation: Ike environmental toll apparent

Oct 05, 2008 | User rating: not rated yet
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Gas From the Past Gives Scientists New Insights into Climate and the Oceans

Oct 03, 2008 | User rating: not rated yet
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