/r/askscience

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Why does the atmosphere not stratify itself by the molecular mass of its components, with the heaviest gas at the bottom (e.g. CO2, O2, N2...He2, H2) ?

1352 upvotes • tarandfeathers

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In space, can magnetic material orbit a magnet using magnetism the same way mass orbits each other using gravity?

1351 upvotes • Jakeunderscore

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Why do some diseases cause a loss of appetite?

1351 upvotes • Fragrant_Novel_3907

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What were dinosaur immune systems like? How were they different from animals today?

1351 upvotes • Lechuga257

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Why do different species of animal age at different rates?

1350 upvotes • Trickykids

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If a laser is shot in space and it doesn't hit it's target, what happens to the laser?

1349 upvotes • lauralouhoo

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What's the limiting factor for electron microscopes' resolution?

1349 upvotes • domdtyler

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How do marsupials clean their pouches? Do they smell terrible?

1349 upvotes • zimplezample

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Why is the LADEE robotic explorer going to take a month to get to the moon when the Apollo missions took a few days?

1347 upvotes • Demeter_of_New

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Why is a rounded nose on an airplane/rocket more aerodynamic than a pointed nose?

1347 upvotes • slipperyoatmeal

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
Why does the atmosphere not stratify itself by the molecular mass of its components, with the heaviest gas at the bottom (e.g. CO2, O2, N2...He2, H2) ?	1352	tarandfeathers
In space, can magnetic material orbit a magnet using magnetism the same way mass orbits each other using gravity?	1351	Jakeunderscore
Why do some diseases cause a loss of appetite?	1351	Fragrant_Novel_3907
What were dinosaur immune systems like? How were they different from animals today?	1351	Lechuga257
Why do different species of animal age at different rates?	1350	Trickykids
If a laser is shot in space and it doesn't hit it's target, what happens to the laser?	1349	lauralouhoo
What's the limiting factor for electron microscopes' resolution?	1349	domdtyler
How do marsupials clean their pouches? Do they smell terrible?	1349	zimplezample
Why is the LADEE robotic explorer going to take a month to get to the moon when the Apollo missions took a few days?	1347	Demeter_of_New
Why is a rounded nose on an airplane/rocket more aerodynamic than a pointed nose?	1347	slipperyoatmeal