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Mount Diablo, a Story of Place

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This is an excerpt from photographer and longtime Bay Nature contributor Stephen Joseph’s new book, Mount Diablo, A Story of Place and Inspiration. The book consists of hundreds of Joseph’s photographs, taken over three years on the mountain, and features essays by local conservation leaders.

black walnut tree

Tree Detectives

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The Northern California black walnut led scientists into a genetic mystery: is this a rare tree, or a common one?