/r/askscience

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I can switch between breathing from my mouth, my nose, or both, even with both of my mouth and nose open. Anatomically and physiologically, how does this happen? Also, how does the body switch between the right and left nostrils?

1249 upvotes • SS7Hamzeh

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I sat in disbelief as my physics professor told the class that cell phones emit EM waved that will fry your brain because they are the same thing as microwaves and UV waves. Was he BS'ing or am I just terribly misinformed?

1248 upvotes • ISS5731

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Is it actually bad to mix battery brands, or is this a marketing trick?

1247 upvotes • [deleted]

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If I'm traveling in a spaceship at near light speed, so it's something like 1 week on board the ship is 1 year on Earth... Do I need enough rocket fuel for 1 week or 1 year?

1247 upvotes • notasmotpoker

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Why does wind whistle when it blows through objects like doors, trees etc?

1247 upvotes • YoungOrah

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How much alcohol would an average 6ft tall 185Ib male have to consume to die?

1246 upvotes • AbyssalZeus

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When you successfully fight off a mutated pathogen via antibodies from a previous infection/vaccination (that have reduced effectiveness, but still get the job done), does your body create updated antibodies for the mutated pathogen?

1246 upvotes • polar_nopposite

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Certain radiation can be blocked with different thicknesses of matter; is there an equivalent that can be used to block a magnetic field?

1245 upvotes • SteakPizza

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considering the stomach is highly vascular, does the use of blood thinners and/or beta blockers affect digestion?

1245 upvotes • Livid-Rutabaga

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Can the Earthquake in Turkey lead to more in different areas from aftershocks?

1244 upvotes • NoxKh

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
I can switch between breathing from my mouth, my nose, or both, even with both of my mouth and nose open. Anatomically and physiologically, how does this happen? Also, how does the body switch between the right and left nostrils?	1249	SS7Hamzeh
I sat in disbelief as my physics professor told the class that cell phones emit EM waved that will fry your brain because they are the same thing as microwaves and UV waves. Was he BS'ing or am I just terribly misinformed?	1248	ISS5731
Is it actually bad to mix battery brands, or is this a marketing trick?	1247	[deleted]
If I'm traveling in a spaceship at near light speed, so it's something like 1 week on board the ship is 1 year on Earth... Do I need enough rocket fuel for 1 week or 1 year?	1247	notasmotpoker
Why does wind whistle when it blows through objects like doors, trees etc?	1247	YoungOrah
How much alcohol would an average 6ft tall 185Ib male have to consume to die?	1246	AbyssalZeus
When you successfully fight off a mutated pathogen via antibodies from a previous infection/vaccination (that have reduced effectiveness, but still get the job done), does your body create updated antibodies for the mutated pathogen?	1246	polar_nopposite
Certain radiation can be blocked with different thicknesses of matter; is there an equivalent that can be used to block a magnetic field?	1245	SteakPizza
considering the stomach is highly vascular, does the use of blood thinners and/or beta blockers affect digestion?	1245	Livid-Rutabaga
Can the Earthquake in Turkey lead to more in different areas from aftershocks?	1244	NoxKh