Ask a Scientist [topic - SF's primeval waterscape]

Did you know that southeastern San Francisco was once dominated by the watersheds of two large creeks, while large parts of the north and west had no creeks at all because they were covered with sand dunes? Learn about the unique features of San Francisco's primeval waterscape and find out how the city used and abused its many creeks and lakes as it grew into the modern metropolis we call home. Plus take a virtual tour of the remaining free-running creeks in San Francisco (which you can visit!).