/u/appropriate-username's posts in /r/askscience

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What is happening to the electrical signals from one's brain when one's muscles are too tired to obey? In other words, what does "too tired" mean physiologically in this context?

46 upvotes

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Are facial expressions similar among animals/living things in general? If a dog is "smiling," how likely is it that it feels something sort of similar to what humans do when they smile?

31 upvotes

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A very quick question, sorry if it's stupid, but why is a pap smear done before a biopsy, rather than just doing the biopsy directly?

8 upvotes

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Is honey a better/more healthy sweetener to use with hot water than sugar?

1 upvotes

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Can we discuss various food additives and the scientific consensus on their safety?

1 upvotes

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Are there likely to be any/many differences between the multivitamins one can buy or does it make sense to just buy whatever is cheapest?

1 upvotes

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Myopia/nearsightedness and heavy computer use relationship?

1 upvotes

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How can I prevent my metabolism from slowing down?

1 upvotes

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What causes one's side to ache after exercise and how would one prevent this?

1 upvotes

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Do cell phones affect sperm?

0 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
What is happening to the electrical signals from one's brain when one's muscles are too tired to obey? In other words, what does "too tired" mean physiologically in this context?	46
Are facial expressions similar among animals/living things in general? If a dog is "smiling," how likely is it that it feels something sort of similar to what humans do when they smile?	31
A very quick question, sorry if it's stupid, but why is a pap smear done before a biopsy, rather than just doing the biopsy directly?	8
Is honey a better/more healthy sweetener to use with hot water than sugar?	1
Can we discuss various food additives and the scientific consensus on their safety?	1
Are there likely to be any/many differences between the multivitamins one can buy or does it make sense to just buy whatever is cheapest?	1
Myopia/nearsightedness and heavy computer use relationship?	1
How can I prevent my metabolism from slowing down?	1
What causes one's side to ache after exercise and how would one prevent this?	1
Do cell phones affect sperm?	0