/r/askscience

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Only show posts with narrations

Why does a hair come back if I pull it out by the root? What's causing my body to say, "Oh, I remember there used to be a hair there, better regrow one."

4704 upvotes • jgrey0907

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What do we know about the gut's role in depression, and have there been recent major shifts in understanding?

4703 upvotes • FunUniverse1778

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How would one be able to tell an antimatter explosion from a run of the mill normal nuclear detonation?

4702 upvotes • Elrigoo

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How cautious should I be about the "big one" inevitably hitting the west-coast?

4696 upvotes • holdingsome

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Cooking: I've often heard that salt "brings out the flavor" of a dish. What does this mean in chemical terms?

4696 upvotes • envatted_love

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How does radiometrically dating rocks work if all radioactive isotopes came from super novae millions of years ago? Wouldn't all rocks have the same date?

4693 upvotes • TunaFishIsBestFish

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When we use tools like uranium dating and carbon dating to identify the ages of objects, how are we sure of the starting concentration of those materials such that we can date the objects by measuring the concentration of those materials remaining in the objects?

4691 upvotes • JansTurnipDealer

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What kind of reactions are taking place inside the barrel of whiskey to give it such a large range of flavours?

4690 upvotes • Crowbars2

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Do sound canceling headphones function as hearing protection in extremely loud environments, such as near jet engines? If not, does the ambient noise 'stack' with the sound cancellation wave and cause more ear damage?

4689 upvotes • GATOR7862

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In US states with deregulated electricity markets, is there any meaningful market impact when consumers choose to purchase electricity from 100% renewable energy suppliers?

4684 upvotes • ButterGolem

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
Why does a hair come back if I pull it out by the root? What's causing my body to say, "Oh, I remember there used to be a hair there, better regrow one."	4704	jgrey0907
What do we know about the gut's role in depression, and have there been recent major shifts in understanding?	4703	FunUniverse1778
How would one be able to tell an antimatter explosion from a run of the mill normal nuclear detonation?	4702	Elrigoo
How cautious should I be about the "big one" inevitably hitting the west-coast?	4696	holdingsome
Cooking: I've often heard that salt "brings out the flavor" of a dish. What does this mean in chemical terms?	4696	envatted_love
How does radiometrically dating rocks work if all radioactive isotopes came from super novae millions of years ago? Wouldn't all rocks have the same date?	4693	TunaFishIsBestFish
When we use tools like uranium dating and carbon dating to identify the ages of objects, how are we sure of the starting concentration of those materials such that we can date the objects by measuring the concentration of those materials remaining in the objects?	4691	JansTurnipDealer
What kind of reactions are taking place inside the barrel of whiskey to give it such a large range of flavours?	4690	Crowbars2
Do sound canceling headphones function as hearing protection in extremely loud environments, such as near jet engines? If not, does the ambient noise 'stack' with the sound cancellation wave and cause more ear damage?	4689	GATOR7862
In US states with deregulated electricity markets, is there any meaningful market impact when consumers choose to purchase electricity from 100% renewable energy suppliers?	4684	ButterGolem