_AlreadyTaken_

_AlreadyTaken_ t1_ixb20tk wrote

Once your eyes are fully adjusted a full moon is surprisingly bright. I've turned off my headlight and hiked by moonlight.

In deep space though the light reflected off an object would suffer from the inverse square rule so this faint light would quickly dissapear into the background.

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_AlreadyTaken_ t1_ixb125c wrote

The shadow contrast on objects even in orbit is severe. The darkness is so deep it makes it impossible to see without artificial light. Astronauts say the change from daylight to night is dramatic and sudden and so is the drop in temperature.

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_AlreadyTaken_ t1_iwdttsj wrote

I wouldn't be surprised if we see more connections between the gut-brain revolving around the vagus nerve. It joins the brain suspiciously close to areas like the hippocampus and the substantia nigra where we see dementia and parkinson's start.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6170613/

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5440238/

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_AlreadyTaken_ t1_itj5j13 wrote

One thing I learned about steel recycling is that copper contamination is a growing problem. It is impossible to completely remove all copper from recycled scrap and everytime more scrap is put into the mix the steel gets more and more contaminated. The end result is steel gets brittle. There is no economically viable way to remove it so the fix is to keep watering it down with virgin iron from ore.

https://pubs.acs.org/doi/10.1021/acs.est.7b00997

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