/u/Grep2grok's posts in /r/askscience

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How many times has the average drop of water been through an animal kidney in the history of Earth?

6571 upvotes

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How much of a human's microplastic burden could be attributed to tooth-brushing? This bristle I pulled out of the back of my throat this morning got me thinking -- these are being rubbed on my tooth-rocks thousands of times a day...

1647 upvotes

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how do you structure a research lab meeting?

20 upvotes

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Driving through Arizona. Why are the dust devils more visible through polarized lenses? What's polarizing? The sky?

14 upvotes

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Why do the activated carbon balls used as dessicant in hard drives repel each other? What makes them electrically repulsive?

2 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
How many times has the average drop of water been through an animal kidney in the history of Earth?	6571
How much of a human's microplastic burden could be attributed to tooth-brushing? This bristle I pulled out of the back of my throat this morning got me thinking -- these are being rubbed on my tooth-rocks thousands of times a day...	1647
how do you structure a research lab meeting?	20
Driving through Arizona. Why are the dust devils more visible through polarized lenses? What's polarizing? The sky?	14
Why do the activated carbon balls used as dessicant in hard drives repel each other? What makes them electrically repulsive?	2