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Geologic Column: Celebrating Old Rock Day

Old Rock Day may not be a household-named holiday, but on Jan. 7, geoscientists and geology enthusiasts will encourage people to celebrate and learn more about old rocks and fossils. 
07 Jan 2018

Geologic Column: Musings on the autumn equinox

Friday, Sept. 22, is the autumn equinox, an astronomical event all about balance that heralds changes in weather and attitudes.
11 Sep 2017

Geologic Column: Rebirth on the vernal equinox

Although March is a particularly tempestuous month, known for producing record-breaking snowstorms and damaging tornadoes, cultures around the world have for millennia also recognized it as a time of rebirth.

14 Mar 2017

Geologic Column: New Year's as we know it is new

Although commemorating the start of a new year and looking back on the past year is one of humanity’s oldest traditions, celebrating it on Jan. 1 is a relatively recent occurrence.  
 

 

31 Dec 2016

Geologic Column: The dog days of July

As months go, July has some distinctive qualities. In particular, it’s when the so-called dog days of summer begin. Today, we tend to think that dog days refers simply to the hottest part of summer, but the ancient civilizations of Europe had a more astronomically based understanding.

13 Jul 2016

Geologic Column: The beginning of "time" as we know it

We have many methods for measuring things — volumes, lengths, areas, for example — but we have only one system to measure time. It's based on three astronomical cycles: a day is based on one rotation on our axis; a month is based on one orbit of the moon around Earth; and the year is based on one orbit of Earth around the sun. Our calendar has changed some over the millennia but has remained remarkably constant. 
13 Dec 2015