Why do astronauts' bodies waste away? Space Station study points to mitochondria

TL;DR — A Nature news item reporting an International Space Station study suggesting mitochondria may explain why astronauts' bodies deteriorate in space; it is biomedical/space-physiology research with no connection to AI or machine learning.

• Human cells cultured in microgravity produced fewer mitochondrial proteins, pointing to mitochondrial dysfunction as a driver of spaceflight-associated muscle/tissue wasting.
• The finding links reduced mitochondrial protein production to the "wasting away" of astronauts' bodies during extended time in orbit.
• Content is thin (title plus a one-line abstract), so specifics on methods, magnitude of effect, and mechanisms are not provided.
• None of the available AI topics apply; this is space biology, hence "Other."