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Exploratorium

Quick answer

Frank Oppenheimer, a physicist who worked on the Manhattan Project and was blacklisted during the McCarthy years, founded the Exploratorium in 1969 in the Palace of Fine Arts. It was the first museum built entirely around exhibits the public could handle, and became the model for science centers worldwide. It moved to Pier 15 in 2013 and shows more than 600 exhibits.

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Full transcript

Frank

Frank Oppenheimer was a physicist who worked on the Manhattan Project. After the war the House Un-American Activities Committee came for him; he was forced out of the University of Minnesota in 1949 and spent nearly a decade running a cattle ranch in Colorado. When he came back to science he had a conviction that the public understood almost nothing about how the physical world worked — and that was not the public's fault. Scientists had stopped explaining. In late August 1969 he opened the Exploratorium in the Palace of Fine Arts, with almost no fanfare. Every exhibit was built to be touched, pushed, cranked and broken. The philosophy was: if you cannot interact with it, you are not learning from it. That idea — a hands-on science center for the general public — did not exist before Oppenheimer invented it.

What You Are Standing In

The Exploratorium moved here to Piers 15 and 17 in April 2013. The building is a restored pier with six hundred exhibits spread across indoor galleries and an outdoor plaza. There is a tornado you can walk through, a fog bridge, a giant concave mirror that makes you look like you are floating, and a room where your shadow freezes on the wall. Everything works. That is the operational miracle of this place — six hundred interactive machines, most of them built in-house at the machine shop you can watch through a glass wall, and they are all working because a team of explainers resets them every morning.

How to Do It

Do not try to see everything. Pick a gallery — the Tinkering Studio if you have kids, the Seeing gallery if you like optics, the Living Systems if you want to watch plankton under a microscope. Give each exhibit thirty seconds of your hands before you decide whether to stay. Some of the best ones look like nothing at all from a distance.

The checkable facts

  • Frank Oppenheimer worked on the Manhattan Project with his brother J. Robert Oppenheimer
  • He was forced to resign from the University of Minnesota in 1949 after a House Un-American Activities Committee inquiry, and ran a Colorado cattle ranch for almost a decade
  • The Exploratorium opened at the Palace of Fine Arts in late August 1969
  • It relocated to Piers 15 and 17 in April 2013

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Frequently asked

Why was Frank Oppenheimer blacklisted?
He had joined the Communist Party briefly in the late 1930s and acknowledged it before the House Un-American Activities Committee in 1949. His university position ended, no American physics department would hire him, and he bought a cattle ranch in Colorado. He came back to teaching a decade later at a Colorado high school.
Is the Exploratorium only for children?
No. The exhibits were built for adults as much as for families, and several galleries reward patience rather than energy, particularly the optics and perception pieces. Weekly evening sessions are restricted to visitors over eighteen. Crowds are heaviest during school holidays, when the pace on the floor changes noticeably.
How many exhibits are there and who builds them?
More than 600, and most were made on site. The museum keeps its own machine shop, visible behind glass from the floor, where staff design, build, repair and retire pieces continuously. The designs are published openly, which is why versions of these exhibits turn up in science centers on every continent.
What is the Tinkering Studio?
A workshop area inside the museum where visitors build things from real materials rather than press buttons: circuits, marble machines, wind tubes, sewn electronics. Facilitators keep it running instead of instructing. It grew out of the museum's teacher-training work and has been copied widely as a model for hands-on learning spaces.
How long does a visit take?
Three to four hours covers only a fraction of it. The campus runs to roughly 330,000 square feet across two piers, and nobody finishes it in a day. Choosing two galleries and giving each exhibit a real attempt works better than walking the whole floor, which produces a blur and sore feet.

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