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

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Why are galaxies shaped like spirals? Why doesn't the spiral structure stretch out and disappear after a few galactic revolutions?

345 upvotes

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Why aren't planets tidally locked to the sun, the way moons are tidally locked to their planet?

17 upvotes

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Could disrupting one's intestinal bacteria lead to weight loss?

4 upvotes

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Why are so many mountain peaks made of limestone?

3 upvotes

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With a large enough magnifying glass, could I light a fire using concentrated moonlight?

1 upvotes

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Do we know the third derivative of the expansion of the universe?

1 upvotes

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What would be a greater disruption to civilization: Gravity turning off for 5 seconds, or friction turning off for 5 seconds?

1 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Why are galaxies shaped like spirals? Why doesn't the spiral structure stretch out and disappear after a few galactic revolutions?	345
Why aren't planets tidally locked to the sun, the way moons are tidally locked to their planet?	17
Could disrupting one's intestinal bacteria lead to weight loss?	4
Why are so many mountain peaks made of limestone?	3
With a large enough magnifying glass, could I light a fire using concentrated moonlight?	1
Do we know the third derivative of the expansion of the universe?	1
What would be a greater disruption to civilization: Gravity turning off for 5 seconds, or friction turning off for 5 seconds?	1