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catherine hudson

Geomedia: Television: 'NOVA' for the earth science enthusiast

“NOVA,” the weekly prime-time science series that airs on PBS, is known for producing high-quality TV documentaries on subjects ranging from espionage and the military to ancient civilizations and nature. Naturally, much “NOVA” programming touches on topics in geoscience, so we decided to review several recent hour-long episodes that might be of particular interest to our readers.

15 Jun 2016

Peculiar shape of hair ice linked to fungus

If you have ever taken a morning hike through the woods and seen strange, silky-looking ice on fallen logs, you might have been observing a phenomenon that has puzzled hikers and scientists alike for at least a century. In a new study, researchers examining so-called hair ice have unraveled an explanation for these peculiar formations.

13 Oct 2015

Wedge approach proposed to lower water stress

Roughly 30 percent of the global population — or about 2.2 billion people — lives in water-stressed parts of the world, where high freshwater withdrawals endanger ecosystems, agriculture and drinking-water supplies. If current population and water usage trends persist, this fraction could rise to about one-half by the century’s end. In a recent study, researchers — taking a page from the climate-change mitigation literature — have proposed a “wedge” approach to address global water stress, laying out how various tactics could ease the growing problem.

22 Apr 2015

Colorado River Basin sees severe groundwater depletion

Over the past 14 years, the Colorado River Basin has experienced its worst drought since precipitation records have been kept, starting in the 1960s. The basin supplies water used for agriculture and in households in seven states, affecting more than 40 million people. In a study recently published in Geophysical Research Letters, researchers have found that the reservoirs that store water in the basin are at record low levels. What’s more, the research shows that in addition to shrinking reservoirs, groundwater is being depleted much faster than previously thought, which could have major implications for the region’s future water security.

24 Sep 2014