The San Francisco Bay is our region's dominant geographic feature.

Peering into Muddy Waters

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One measure of the ecological richness of the Bay is its role as a major nursery for five resident species of sharks.

Rivers in the Bay

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San Francisco Bay presented a thrilling—yet possibly lethal—mystery to a young Spanish captain as he sailed up to probe the entry to the Golden Gate for the first time on the morning of August 5, 1775. Juan Manuel de Ayala … Read more

The Art of Restoration

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The air over Cullinan Ranch is cool and moist. Only the faintest gray line marks the location, south across San Pablo Bay, of the East Bay hills. The wetlands here, just north of Route 37, bear imprints of human use. … Read more