This year marks the 75th anniversary of an icon. When it opened in 1937, the Golden Gate Bridge was the longest suspension bridge ever built, constructed in one of the world's most challenging settings. For the men who poured the concrete and drove each steel rivet, it was a life-changing experience.

Kids growing up in the Bay Area have access to more than a dozen science museums and zoos. But in much of the state, those opportunities don't exist. With science programs getting trimmed in schools, many kids are left with little access to hands-on science. We meet one man who wants to change that.

NASA's planet-hunting Kepler space telescope has been given more time to look for life-supporting planets outside our own solar system. The project, which has found more than 2,000 planets since it was launched in 2009, recently edged out several popular space programs to secure an extension in funding. We talk with UC Berkeley's Geoff Marcy, one of the world's most prolific planet hunters. He works on the Kepler project.

California has helped bring to life many laws promoting clean water and clean air, laws that eventually informed national policy credited with cleaning up vast swaths of the country. But sometimes, the picture is a lot less clear. Many scientists now say one pioneering California law was a big mistake. And changing the law? That's not so easy.

For generations they've competed with seagulls as the signature sound of coastal America. But that "signature sound" of the foghorn isn't what it used to be. Listen carefully, and you'll hear the traditional seaside soundscape changing.