/r/askscience

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In this gif of white blood cells attacking a parasite, what exactly is happening from a chemical reaction perspective?

8155 upvotes • blast4past

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From my 7 year old: Do the things in our bodies ever get tired? Like cells and antibodies? Do they have to rest?

8140 upvotes • stanselmdoc

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Does a steady or a blinking digital clock use more energy?

8138 upvotes • shawbin

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Have humans always had an all year round "mating season", or is there any research that suggests we could have been seasonal breeders? If so, what caused the change, or if not, why have we never been seasonal breeders?

8137 upvotes • SirMacNotALot

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Why does a vaccine have to be injected through a needle?

8134 upvotes • DePedro49

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If you stand on a skateboard, hold an umbrella in front of you, point a leafblower at it and turn it on, which direction will you move?

8112 upvotes • BoulderFalcon

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What are we currently doing to combat the year 2038 problem?

8110 upvotes • Whymanwhy12

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Is there any record of any object from earth being ejected to space by natural forces?

8103 upvotes • desichhokra

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If fire is a reaction limited to planets with oxygen in their atmosphere, what other reactions would you find on planets with different atmospheric composition?

8099 upvotes • DodgeBungalow

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Why don't emails arrive immediately like Instant Messages? Where does the email go in the time between being sent and being received?

8093 upvotes • I-0_0-l

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
In this gif of white blood cells attacking a parasite, what exactly is happening from a chemical reaction perspective?	8155	blast4past
From my 7 year old: Do the things in our bodies ever get tired? Like cells and antibodies? Do they have to rest?	8140	stanselmdoc
Does a steady or a blinking digital clock use more energy?	8138	shawbin
Have humans always had an all year round "mating season", or is there any research that suggests we could have been seasonal breeders? If so, what caused the change, or if not, why have we never been seasonal breeders?	8137	SirMacNotALot
Why does a vaccine have to be injected through a needle?	8134	DePedro49
If you stand on a skateboard, hold an umbrella in front of you, point a leafblower at it and turn it on, which direction will you move?	8112	BoulderFalcon
What are we currently doing to combat the year 2038 problem?	8110	Whymanwhy12
Is there any record of any object from earth being ejected to space by natural forces?	8103	desichhokra
If fire is a reaction limited to planets with oxygen in their atmosphere, what other reactions would you find on planets with different atmospheric composition?	8099	DodgeBungalow
Why don't emails arrive immediately like Instant Messages? Where does the email go in the time between being sent and being received?	8093	I-0_0-l