3 ms·
A great question. And one fascinating but maybe disturbing thing we have seen from the ISS is the body seems to be pretty aggressive with bone decalcification i
by glenstein 2y ago
A great question. And one fascinating but maybe disturbing thing we have seen from the ISS is the body seems to be pretty aggressive with bone decalcification in lower-G environments. I don't know if there's a corollary for higher-G, and the mechanism is orthogonal to questions about heritability, but meaningful changes happen even within the life span of a single person.
- msephton 2y agoGravity strength varies all over Earth so there are areas with slightly higher than normal gravity. eg. Dartmoor. I wonder if people who live there have higher bone density? https://en.wikipedia.org/wiki/Gravity_anomalies_of_Britain_and_Ireland https://en.wikipedia.org/wiki/Gravity_anomalies_of_Britain_a...
- rbanffy 2y agoI’d assume any such signal will be buried in the noise. The difference is very small.
- msephton 2y agoYou might be interested to know that the difference is quite noticeable! At least on Dartmoor. Walking feels very different.
- rbanffy 2y agoThe variation is about 0.7%. I doubt a human would notice anything different.
- msephton 1y agoYou can doubt it. If only it was possible to go to these locations in real life and verify it yourself? That's exactly what I did. I went to Dartmoor and the difference is quite noticeable. YMMV
- sitkack 2y agoAll life is a stack of autonomic systems. My hunch is that a human in a high G environment would make a bunch of adaptations even if they were born in orbit. By 3-5 generations they might even be another species. I am sure there has been some research done on raising mice in a high-g environment.
- sitkack 2y agoHypergravity and microgravity exhibited reversal effects on the bone and muscle mass in mice https://www.nature.com/articles/s41598-019-42829-z https://www.nature.com/articles/s41598-019-42829-z