The Penrose process is a way of extracting energy from spinning black holes by slowing down their spin. Simon Carter says, I was relistening to your Christmas message from a few years ago titled The Screwy Universe. You mentioned an experiment had confirmed this to Two Sigma and you were waiting to see if further details would either rule it out or further confirm. Has there been any further update over the last few years? There have been updates, but they're very slow and tentative.
Welcome to the March 2023 Ask Me Anything episode of Mindscape! These monthly excursions are funded by Patreon supporters (who are also the ones asking the questions). We take questions asked by Patreons, whittle them down to a more manageable number — based primarily on whether I have anything interesting to say about them, not whether the questions themselves are good — and sometimes group them together if they are about a similar topic. Enjoy!
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