In Göttingen, Germany, there is certainly a four-tonne steel ball that can be elevated up a 14-metre tower — and then dropped in much less than two seconds, crashing back to earth. It can make very small, synthetic earthquakes: this is why.

Thanks to all the crew at Wiechert’sche Erdbebenwarte Göttingen! You can uncover out far more about them listed here:

Three items I had to cut out of this movie, because they failed to very in shape into the tale or because I could not film them:

The cause the steel ball survived two environment wars is because the university’s records detailed it by use as a “rock-ball”, not by composition as a “steel ball” – so no-one particular melted it down for weaponry.

The observatory crew refill that pit each individual yr to make the ground flat, and the ball just digs a gap yet again. The rock’s just staying compressed beneath. They joke that, somewhere in Australia, there is certainly a bit by bit rising hill…

And ultimately, the ground steams for a tiny even though soon after the ball hits: it gets rather warm…

Edited by Michelle Martin (@mrsmmartin)

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