/u/BourgeoisStalker's posts in /r/askscience

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Wikipedia states, "The human nose is extremely sensitive to geosimin [the compound that we associate with the smell of rain], and is able to detect it at concentrations as low as 400 parts per trillion." How does that compare to other scents?

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Is it really the lack of consistent rain that makes roads more dangerous in rain?

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I have a noisy Qi phone charger. What's making the noise?

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What does a hippopotamus feel like?

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What methods are used to date meteorites?

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What evolutionary pressures caused elephants to be so smart?

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Does the North American Vertical Datum equal sea level?

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The dangerous first 5 minutes of rain on a roadway.

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Are there trees making the kind of sap that will eventually be amber, right now?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Wikipedia states, "The human nose is extremely sensitive to geosimin [the compound that we associate with the smell of rain], and is able to detect it at concentrations as low as 400 parts per trillion." How does that compare to other scents?	11625
Is it really the lack of consistent rain that makes roads more dangerous in rain?	1
I have a noisy Qi phone charger. What's making the noise?	1
What does a hippopotamus feel like?	1
What methods are used to date meteorites?	1
What evolutionary pressures caused elephants to be so smart?	1
Does the North American Vertical Datum equal sea level?	1
The dangerous first 5 minutes of rain on a roadway.	1
Are there trees making the kind of sap that will eventually be amber, right now?	1