Hurricane Earl, currently a Category Two storm on the Saffir-Simpson scale with maximum sustained winds of 100 knots (115 miles per hour), continues to push relentlessly toward the U.S.

Large changes in the sun's energy output may drive unexpectedly dramatic fluctuations in Earth's outer atmosphere.

In the first peer-reviewed scientific paper to be published about the Icelandic volcano since its eruption in April 2010, UK researchers write that the ash plume which hovered over Scotland carried a significant and self-renewing electric charge.

Trout and salmon are among the world's most familiar freshwater fishes, but numbers have fallen over recent decades – in some areas, dramatically.

Washington, D.C.—Tiny variations in the isotopic composition of silver in meteorites and Earth rocks are helping scientists put together a timetable of how our planet was assembled beginning 4.568 billion years ago. The new study, published in the journal Science, indicates that water and other key volatiles may have been present in at least some of Earth's original building blocks, rather than acquired later from comets, as some scientists have suggested.

They present their initial findings at ILA, the international aerospace trade show in Berlin, from June 8 to 13, 2010.

The poles control much of our global climate. Giant ice sheets in Antarctica behave like mirrors, reflecting the sun's energy and moderating the world's temperatures.

A post-mortem study of the hearts of 21 young people in Mexico City has found that the heart begins to show the adverse effects of air pollution at a young age and that tiny bits of inactivated bacteria that hitch a ride on pollutants may make the problem worse.