I tot above 8k m oxygen level very low.
#1

Any aircraft engineers can explain why can fry above 10k M engines still no lack of oxygen?.

https://phys.org/news/2024-01-qa-alaska-...ngers.html
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#2

Means science is following the money...spreading fake science and fear...

疫苗可以不打, 手枪一定要打!
疫苗可以不注射, 精子一定要远射!
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