Topic: Larry Nittler
NASA's Messenger craft has been orbiting Mercury for 88 days. Among its findings: a Saturn-like magnetic field, high concentrations of sulfur, and some support for the notion there is water ice in shadowed craters.
06/16/2011 08:00 pm
Uncovered in the central part of Antarctica, the two tiny meteorites appear to have come from ancient comets.
05/08/2010 10:31 am