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Welcome to Yosemite, the new Pyrocene Park
By Stephen Pyne
![](https://i0.wp.com/writersontherange.org/wp-content/uploads/2021/09/laurel-balyeat-ExarETx4xNA-unsplash.jpg?resize=500%2C375&ssl=1)
The Pleistocene epoch that began 2.6 million years ago sent ice in waves through Yosemite. Glaciers gouged out great valleys…
Photo by Laurel Balyeat, Yosemite Park
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