/r/askscience

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How do odour sprays like Febreeze or Lysol eliminate odours in the air?

3550 upvotes • laapse

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How long it will take Voyager to get to Ninth Planet?

3547 upvotes • vvolny

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If a gamma ray burst were to strike earth, would the distance it originated from change its effects at all? Also, would it be possible for the burst to only effect part of the planet, say, if it struck the northern but not southern hemisphere?

3538 upvotes • Carpy444

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Why do lasers have a "grainy texture" on the light that they produce?

3537 upvotes • Command_Master

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If you already have antibodies to a disease, would catching that disease afterward “boost” the antibodies allowing them to last longer than their expiration date?

3535 upvotes • Aquatax

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Could life actually be supported by a constant thick mist and no rain?

3532 upvotes • Nowhere_Man_Forever

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The pupils in our eyes shrink when faced with bright light to protect our vision. Why can't our ears do something similar when faced with loud sounds?

3532 upvotes • howaboutwetryagain

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Why does superfluidity only occur in helium?

3532 upvotes • hannomak

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How close could a machine get to the Sun?

3527 upvotes • aggasalk

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Why is there a Voronoi diagram on my giant Reese's peanut butter cup?

3526 upvotes • jordonph

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
How do odour sprays like Febreeze or Lysol eliminate odours in the air?	3550	laapse
How long it will take Voyager to get to Ninth Planet?	3547	vvolny
If a gamma ray burst were to strike earth, would the distance it originated from change its effects at all? Also, would it be possible for the burst to only effect part of the planet, say, if it struck the northern but not southern hemisphere?	3538	Carpy444
Why do lasers have a "grainy texture" on the light that they produce?	3537	Command_Master
If you already have antibodies to a disease, would catching that disease afterward “boost” the antibodies allowing them to last longer than their expiration date?	3535	Aquatax
Could life actually be supported by a constant thick mist and no rain?	3532	Nowhere_Man_Forever
The pupils in our eyes shrink when faced with bright light to protect our vision. Why can't our ears do something similar when faced with loud sounds?	3532	howaboutwetryagain
Why does superfluidity only occur in helium?	3532	hannomak
How close could a machine get to the Sun?	3527	aggasalk
Why is there a Voronoi diagram on my giant Reese's peanut butter cup?	3526	jordonph