Jack Hall

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The Most Important Organism?

On a recent fossil collecting trip a friend asked, “What do you think is the most important organism on the Earth?” She knew full well I would answer, “Humans!” since we are the...

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Ansel Adams

Ansel Adam’s clear environmentalist’s voice in concert with his breathtaking photography helped to arouse a budding environmental consciousness in the U.S.

The Most Important Organism?

On a recent fossil collecting trip a friend asked, “What do you think is the most important organism on the Earth?” She...

The Human Revolution

Earth as seen at night from space today show high concentrations of human industrialization. 200 years ago, such a picture would show...

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