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Geologic Column: The 'impact factor' of potholes

Bumpily driving along one day last spring on a road that had been battered by a snowy winter in the Northeast and Mid-Atlantic left the author pondering potholes — from a geologic perspective.

07 Oct 2015

Geologic Column: September 26, 1774: The man, the myth, the legend of Johnny Appleseed is born

Little is known about the early life of John Chapman, also known as Johnny Appleseed, except that he was born in Massachusetts on Sept. 26, 1774. But he went on to become an orchardist and nurseryman and eventually a folk hero, helping tame the wilderness by planting apple orchards. 
14 Sep 2015

Comment: Exoplanets: Life on the Terminator

New missions are searching for potentially life-bearing exoplanets around small, cool, red dwarf stars. On many of these exoplanets, the habitable zone lies on the line between sunlight and shadow, which, ironically, is called “the terminator.” Would life be able to exist in the terminator zones?

10 Sep 2015

Hazardous Living: Maps, according to geologists

If you have geologist friends, you may have run across some humorous world maps on social media lately. These maps have garnered lots of attention and we found them amusing, so we're sharing them. 

26 Aug 2015

Geologic Column: Field Sketches

An art exhibit prompted the author to reflect on fieldwork, his library of field notebooks and how geolgists can integrate digital technology into field geology courses.
29 Jul 2015

Comment: Who should be worried about space weather

If a severe solar storm were headed toward Earth, should you worry? And to whom should you turn for reliable information?
25 Jul 2015

Geologic Column: Jack and Jill: The sequel

As the extreme drought in California persists into another year, EARTH’s regular commentator returns with some thoughts on the proposed solutions, and the wisdom of going “up the hill” to fetch your water.

27 Jun 2015

Comment: The arrival of the energy future

In the U.S., both solar and wind energy more than tripled between 2008 and 2013. Renewables are now the fastest growing energy sources. But the first steps on a new path often are tentative and require reinforcement.
25 Jun 2015

Geologic Column: On the Summer Solstice

Today, we can only speculate on the significance that the summer solstice had for our ancestors, but we do know its scientific meaning. The author ruminates on the longest day of the year in the Northern Hemisphere, and its place in our annual journey around the sun.
21 Jun 2015

Comment: The new frontier: Homesteading on Mars

Once relegated to science fiction, the idea of humans colonizing Mars could become a reality. But the lack of an international agreement governing the colonization of other planets challenges us to think about how to use the resources of space fairly, efficiently and ethically.
25 May 2015

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