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Cake day: 2025年6月4日

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  • Sheepy@sh.itjust.workstoScience Memes@mander.xyz2 OP
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    3 个月前

    While there’s definitely a distance at which you could teleport a durian at which it would form a cute micro-comet, it would be practically invisible. Comets are huge things, 100s of meters to kilometers across. The only way you’d be able to appreciate the durian micro-comet would be if you were right next to it. Conveniently, you’d also be able to appreciate the “you” micro-comet you’d form.





  • Well, the “vaguely summarised studies” were the answer to the exact issue you are raising. If that article was too long, then here’s the paper itself:

    https://journals.plos.org/plosone/article?id=10.1371%2Fjournal.pone.0040503

    As it is even longer and even less approachable than the article, I will condense it even further: A group of Hanza, who are hunter-gatherers, had their metabolism measured. Under the commonly held assumption, group of people who spend their whole day travelling on foot, foraging and hunting, would consume more calories.

    However, the study found they used and consumed the same amount of calories as any other group. They weren’t more “efficient”, they burned the same amount of energy walking as any other group. Even through the average distance the men travelled daily was 11km.

    So yes, they do burn hundreds of calories every day walking, with a total daily calorie expenditure no different than somebody in the western world that has a 30 minute jog in the morning.








  • In this context, “negative mass” is a mathematical convenience rather than an actual particle having negative mass.

    Think of it more like “energy required to pull apart a matter-antimatter pair”. In the vacuum of space, the energy that created the pair gets returned when they annihilate. But when near a blackhole, it had to “burn” some of its energy to interrupt that process. Energy is mass, so the blackhole gets less massive.

    Mind you this is a very basic explanation of it. It’s just another quantum whackyness of our universe.