Energy Afterlives

The Geologic Timescale

Earth's history begins 4.5 billion years ago. Most fossil fuels formed considerably more recently in Earth's history.

On Bryn Mawr's campus, if Earth formed at the Moon Bench -- and ends when the Sun consumes it, at the end of Senior Row -- then the entirety of human civilization, from the Agricultural Revolution to today -- is the width of a human hair. 
 

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  1. Coal Geological Materials Selby Hearth

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