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

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If you continued to grind sand into finer and finer particles, would it ever begin behaving like a like a liquid?

2148 upvotes

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How is it that the radius of the universe is larger than ~13.7 billion light years?

7 upvotes

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Why are the sun's rays damaging to our vision only while we're looking directly at it? Why are we unharmed when the sun is in our periphery?

2 upvotes

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If ingesting salt causes dehydration and dehydration causes low blood pressure, why are people with high blood pressure told to avoid sodium? Wouldn't it lower their blood pressure?

1 upvotes

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Does the tilt shift effect make pictures look small for some biological reason or because of how nearby things look in photographs, historically?

1 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
If you continued to grind sand into finer and finer particles, would it ever begin behaving like a like a liquid?	2148
How is it that the radius of the universe is larger than ~13.7 billion light years?	7
Why are the sun's rays damaging to our vision only while we're looking directly at it? Why are we unharmed when the sun is in our periphery?	2
If ingesting salt causes dehydration and dehydration causes low blood pressure, why are people with high blood pressure told to avoid sodium? Wouldn't it lower their blood pressure?	1
Does the tilt shift effect make pictures look small for some biological reason or because of how nearby things look in photographs, historically?	1