Presidio: Changes Through TimeJoin the National Park Service and celebrate the 50th Anniversary of the GGNRA!This half-mile, level walk shows the historical changes to the Presidio, from the Spanish fort all the way to the new Tunnel Tops. Who benefitted from these changes, and who did not?Learn about the people who lived here, and ...
The Nature Sounds Society's lecture-demonstration with surround sound.LEARNhow wildlife is disturbed by human noisehow the national parks are conserving their natural soundscapesTUNE UP YOUR EARShear the difference between mono, stereo, and surround soundhear the environment that we usually try to ignorehear the individual voices in a chaotic jungle soundscapeLISTENtake your ...
Humans have sought "signs from above†for millennia. The scientific search for extraterrestrial intelligence (SETI) began circa 1960, and, today, grows ever deeper and more technologically diverse. The scope of modern research is breathtaking. Methods include targeted searches for electromagnetic (EM) signals near known Earth-like exoplanets, continuous EM scans over ...
