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

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Why do so many medications have "HCl" in them?

1760 upvotes

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Let's say I'm a chemist and someone brings me an unknown substance, asking me to figure out what it is. What steps and tools would I use to answer them?

242 upvotes

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Would we be able to learn anything new from nuclear weapons testing using modern equipment?

130 upvotes

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Dogs seem to have such expressive faces. Are they really emoting in the same way humans do or is this just anthropomorphizing?

56 upvotes

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If Neanderthals and early Humans could interbreed, why do we consider them different species?

29 upvotes

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Does closing schools for several months in the summer have any educational or learning-process benefits?

15 upvotes

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You have been transported to a planet somewhere else in the Milky Way. Is it possible to deduce where you are in relation to Earth? If so, how would you do it, and what equipment would you need?

15 upvotes

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What does it mean when we say that vaccines contain "dead viruses"?

12 upvotes

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Why can't hashing algorithms be reversed?

5 upvotes

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Can somebody explain the Pauli Exclusion Principle / degeneracy pressure?

5 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Why do so many medications have "HCl" in them?	1760
Let's say I'm a chemist and someone brings me an unknown substance, asking me to figure out what it is. What steps and tools would I use to answer them?	242
Would we be able to learn anything new from nuclear weapons testing using modern equipment?	130
Dogs seem to have such expressive faces. Are they really emoting in the same way humans do or is this just anthropomorphizing?	56
If Neanderthals and early Humans could interbreed, why do we consider them different species?	29
Does closing schools for several months in the summer have any educational or learning-process benefits?	15
You have been transported to a planet somewhere else in the Milky Way. Is it possible to deduce where you are in relation to Earth? If so, how would you do it, and what equipment would you need?	15
What does it mean when we say that vaccines contain "dead viruses"?	12
Why can't hashing algorithms be reversed?	5
Can somebody explain the Pauli Exclusion Principle / degeneracy pressure?	5