American Geophysical Union

Winds drive dune movement on Mars

Sand dunes, a common feature on the surface of Mars, can provide a record of recent and past changes. Some dunes near Mars’ polar areas have been observed to move recently due to carbon dioxide ice sublimation, ...

Nov 16, 2011
3.4 / 5 (5) 7

Moon's shadow, like a ship, creates waves

During a solar eclipse, the Moon's passage overhead blocks out the majority of the Sun's light and casts a wide swath of the Earth into darkness. The land under the Moon's shadow receives less incoming energy ...

Oct 05, 2011
4.6 / 5 (5) 3 | with audio podcast

Groundwater depletion rate accelerating worldwide

In recent decades, the rate at which humans worldwide are pumping dry the vast underground stores of water that billions depend on has more than doubled, say scientists who have conducted an unusual, global ...

Sep 23, 2010
4.4 / 5 (25) 9 | with audio podcast

Ocean's color affects hurricane paths

A change in the color of ocean waters could have a drastic effect on the prevalence of hurricanes, new research indicates. In a simulation of such a change in one region of the North Pacific, the study finds that hurricane ...

Aug 13, 2010
4.9 / 5 (8) 3 | with audio podcast