After 69 years, ‘pitch drop’ experiment finally caught on video


In 1927, a researcher at the University of Queensland in Australia began what’s widely recognized as the longest-running experiment ever, the so-called “pitch drop.” It’s a simple set up: fill a flask with tar pitch and let it ooze out the bottom to see how quickly it flows, and eventually it makes a proper drop that falls down — about once every ten years or so. Tar pitch is a substance that appears to be solid, but in fact is actually a slowly flowing liquid. However, since the beginning of that experiment human eyes have never actually seen the pitch drop from the bottom of the flask — the last time the Queensland experiment dropped, the webcam that was set up to see it failed at precisely the wrong moment.

Fortunately, another…

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