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Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science

1105 upvotes • AutoModerator

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Have any rigorous studies shown probiotics that can actually improve gut health?

1105 upvotes • dramaking37

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Why does a french horn need valves?

1105 upvotes • Next-Natural-675

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How do modern navigation aids account for irregularities in the shape of Earth?

1105 upvotes • Equivalent-Bonus-885

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How does the International Space Station get continuous supply of oxygen for the crew?

1104 upvotes • Insomaniacc

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Is an apple separated from the tree alive or dead?

1104 upvotes • lshevtsov

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Are the orbits of the solar system coplanar to the Sun's orbit around the milky way?

1104 upvotes • Darchseraph

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Could one develop (and occasionally update) 'local cultures' yogurt to be sold at international airports that would help prevent people from getting upset stomachs when visiting foreign places?

1103 upvotes • zimian

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How can we really know the size of extra-solar planets?

1103 upvotes • boltguy91

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Why are clouds relatively flat toward the bottom?

1103 upvotes • SplungerPlunger

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science	1105	AutoModerator
Have any rigorous studies shown probiotics that can actually improve gut health?	1105	dramaking37
Why does a french horn need valves?	1105	Next-Natural-675
How do modern navigation aids account for irregularities in the shape of Earth?	1105	Equivalent-Bonus-885
How does the International Space Station get continuous supply of oxygen for the crew?	1104	Insomaniacc
Is an apple separated from the tree alive or dead?	1104	lshevtsov
Are the orbits of the solar system coplanar to the Sun's orbit around the milky way?	1104	Darchseraph
Could one develop (and occasionally update) 'local cultures' yogurt to be sold at international airports that would help prevent people from getting upset stomachs when visiting foreign places?	1103	zimian
How can we really know the size of extra-solar planets?	1103	boltguy91
Why are clouds relatively flat toward the bottom?	1103	SplungerPlunger