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03/19/2017 | 5m 32s
Redwood forests can be mysterious places, but this one raises all kinds of questions. What’s a redwood forest doing in Oakland? Why do the trees grow in concentric circles? And why is one redwood so much bigger than the rest? We have the answers.
Aired: 03/19/17
Video has closed captioning.Cities once converted streams into sewers to make room for development.
Saving San Francisco’s Sea Lions
The Marine Mammal Center in the San Francisco Bay Area is on a mission to save sea lions.
Now Showing
Nature is taking over at North Brother Island, the former home of a typhoid hospital.
The salt marshes in New York's Jamaica Bay support endangered birds and rare turtles.
Hiking Through History in The Presidio
What was San Francisco like before Europeans arrived? Look no further than The Presidio.
Want to know what Chicago looked like 200 years ago? Head to the city’s southeast corner.
