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Exploratorium — The checkable facts
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.
| Claim | Source |
|---|---|
| Frank Oppenheimer worked on the Manhattan Project with his brother J. Robert Oppenheimer | Exploratorium — Our History |
| 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 | Exploratorium — Our History |
| The Exploratorium opened at the Palace of Fine Arts in late August 1969 | Exploratorium — Our History |
| It relocated to Piers 15 and 17 in April 2013 | Exploratorium — Our History |
| The Pier 15 site holds over 600 exhibits, 25 percent of them developed for the new building | Exploratorium — Our History |
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.
Sixty seconds costs nothing
Judge the writing and the voice before you spend anything.