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Environmental Jun 2022

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Refining — 100th Anniversary of HP magazine May 2022

A rich and interesting history

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Powerful Song(s) Apr 2022

In the 45 or 50 years since these songs were written, it has only accelerated

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What I learned at the planetarium (and after) Mar 2022

relative size of planets
To build a scale model of the solar system outdoors:
· Use a basketball for the sun (9.5″ diameter)
· 86′ away from the sun is the earth at ~1/11 inch diameter …

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Subterranean Vibrations Feb 2022

Matthias Rillig, a soil ecologist at the Free University of Berlin

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