/u/HerbziKal's posts in /r/askscience

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If there is indeed microbial life on Venus producing phosphine gas, is it possible the microbes came from Earth and were introduced at some point during the last 80 years of sending probes?

12477 upvotes

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Do bath salts actually have any proven beneficial effects (e.g. on eczema), and is there any real difference between using Dead Sea salt VS Himalayan salt VS Epsom salt?

8329 upvotes

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If person 1 is trapped under water, and person 2 has access to fresh air as well as to person 1, for how long can person 2 breath in fresh air and exhale it into person 1's mouth? Is there enough breathable air in an exhalation for this to last indefinitely, or would CO2 toxicity slowly build up?

124 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
If there is indeed microbial life on Venus producing phosphine gas, is it possible the microbes came from Earth and were introduced at some point during the last 80 years of sending probes?	12477
Do bath salts actually have any proven beneficial effects (e.g. on eczema), and is there any real difference between using Dead Sea salt VS Himalayan salt VS Epsom salt?	8329
If person 1 is trapped under water, and person 2 has access to fresh air as well as to person 1, for how long can person 2 breath in fresh air and exhale it into person 1's mouth? Is there enough breathable air in an exhalation for this to last indefinitely, or would CO2 toxicity slowly build up?	124