The Planet Is Losing Groundwater at an Alarming Rate

When it comes to water scarcity, the loss of groundwater is like the silent killer: It isn’t as easy to measure or monitor as, say, a shrinking reservoir. We’ve known that many aquifers are overtaxed, but a new report shows we’re draining major aquifers faster than they’re being replenished. Not just in… » 6/26/15 9:20am 6/26/15 9:20am

These Twin Orbiters Map the Ebb and Flow of Lunar Gravity Down to the…

Science has long known about the curious gravitational variations of the moon's surface—called mascons—as evidenced by the Doppler shift of radio signals from passing spacecraft. However, researchers are now taking an unprecedented, high-fidelity look at the moon's gravitational field thanks to a pair of washing… » 12/12/12 11:30am 12/12/12 11:30am