From airborne to chemicals to sunshine itself, measuring change in the West Coast’s biggest city. Ben Amstutz/Flickr Southern California’s Mount Wilson is a lonesome, hostile peak — prone to sudden rock falls, sometimes ringed by wildfire — that nevertheless has attracted some of the greatest minds in modern science. George Ellery Hale, one of the godfathers of astrophysics, founded the Mount Wilson Observatory in 1904 and divined that sunspots were magnetic. His acolyte Edwin Hubble used a huge telescope, dragged up by mule train, to prove the universe was expanding. Even Albert Einstein made a pilgrimage in the 1930s to hobnob with the astronomers (and suffered a terrible hair day, a photo shows). To keep reading, click here.
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