/r/askscience

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Only show posts with narrations

Why does a firefly light up? Is it a defense mechanism?

6342 upvotes • RFEngineer

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When you get vaccinated, does your immunity last for a life-time?

6338 upvotes • BigShaggus420

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When a photon is emitted, what determines the direction that it flies off in?

6336 upvotes • slaphead99

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Do single celled organisms experience inflammation?

6336 upvotes • inquilinekea

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Why do joints ache so much when you get the cold/flu?

6328 upvotes • smartysmarts

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What are the consequences of missing a full night of sleep, if you make up for it by sleeping more the next night?

6328 upvotes • djsedna

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What is the fastest beats per minute we can hear before it sounds like one continuous note?

6324 upvotes • Mushycracker

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Do you use muscles to open or close your eyes?

6319 upvotes • weaped

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What did the SapceX Falcon 9 rocket launch look the way it did?

6319 upvotes • Magikarp_used_fly

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We see videos of meteors falling, burning bright, ets. However they appear to always travel at a steep angle. Is there a reason why meteors can not fall to the earth at a perfect perpendicular to the earths surface?

6319 upvotes • funny_mad_scientist

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
Why does a firefly light up? Is it a defense mechanism?	6342	RFEngineer
When you get vaccinated, does your immunity last for a life-time?	6338	BigShaggus420
When a photon is emitted, what determines the direction that it flies off in?	6336	slaphead99
Do single celled organisms experience inflammation?	6336	inquilinekea
Why do joints ache so much when you get the cold/flu?	6328	smartysmarts
What are the consequences of missing a full night of sleep, if you make up for it by sleeping more the next night?	6328	djsedna
What is the fastest beats per minute we can hear before it sounds like one continuous note?	6324	Mushycracker
Do you use muscles to open or close your eyes?	6319	weaped
What did the SapceX Falcon 9 rocket launch look the way it did?	6319	Magikarp_used_fly
We see videos of meteors falling, burning bright, ets. However they appear to always travel at a steep angle. Is there a reason why meteors can not fall to the earth at a perfect perpendicular to the earths surface?	6319	funny_mad_scientist