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

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How come standing up quickly sometimes gives me a headache, and other times I feel nothing?

14 upvotes

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Besides political reasons, is there a benefit to having multiple satellite positioning systems (GPS, GLONASS, Beidou, Galileo)?

8 upvotes

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Are humans' veins closer to the skin than other mammals, which would supplement our "entire body" sweating mechanism?

5 upvotes

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If there were no volcanoes, would the earth blow up?

2 upvotes

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Why is Bismuth-210 more stable in its excited state than in its ground state?

2 upvotes

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In terms of volume and density, what's the difference between a porous material, such as a sponge, and a container in which you can pour water?

1 upvotes

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Do tetrachromats have a color wheel?

1 upvotes

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What would eating a miracle fruit then eating very hot peppers do to you?

1 upvotes

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What is the speed of snap?

1 upvotes

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Does the depth of a swimming pool affect the peak speed of someone swimming in it?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
How come standing up quickly sometimes gives me a headache, and other times I feel nothing?	14
Besides political reasons, is there a benefit to having multiple satellite positioning systems (GPS, GLONASS, Beidou, Galileo)?	8
Are humans' veins closer to the skin than other mammals, which would supplement our "entire body" sweating mechanism?	5
If there were no volcanoes, would the earth blow up?	2
Why is Bismuth-210 more stable in its excited state than in its ground state?	2
In terms of volume and density, what's the difference between a porous material, such as a sponge, and a container in which you can pour water?	1
Do tetrachromats have a color wheel?	1
What would eating a miracle fruit then eating very hot peppers do to you?	1
What is the speed of snap?	1
Does the depth of a swimming pool affect the peak speed of someone swimming in it?	1