Montgomery-Brown is a geophysicist. Her work is far different from that of vulcanologists, who are frequently out in the field collecting rock, lava and ash samples.

Bruce Campbell, of the Center for Earth and Planetary Studies at the Smithsonian's National Air and Space Museum, is at the National Radio Astronomy Observatory in Green Bank, W. Va., to make a radar ...

Montgomery-Brown is a geophysicist. Her work is far different from that of vulcanologists, who are frequently out in the field collecting rock, lava and ash samples.