/r/askscience

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How can I obtain ethanol 100% if at 95.4% is considered an azeotrope?

4070 upvotes • AMOR17

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If the universe is expanding, isn't all matter/energy in the universe expanding with it?

4068 upvotes • Brandacle

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Why does the ice in my ice cube tray sometimes climb upwards as if on an invisible wire?

4068 upvotes • greyballwoodsmall

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Where does house dust come from?

4064 upvotes • 4fecta_Gaming

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How do you know a dated-at 1 million year old hammer wasn't 0.9999 million year old rock that was just made into a hammer in the last 0.0001 years?

4061 upvotes • jgaldjsaglwo4yn4owmg

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What is the physical difference in the brain between an objectively intelligent person and an objectively stupid person?

4060 upvotes • flaminghotcheetos123

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What’s the largest star system in number of planets?

4056 upvotes • sometimeonabench

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AskScience AMA Series: We are Cosmologists, Experts on the Cosmic Microwave Background, Gravitational Lensing, the Structure of the Universe and much more! Ask Us Anything!

4054 upvotes • AskScienceModerator

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If the moon's spin is tidally-locked so that it's synchronized with it rotational rate (causing it to almost always look the same from Earth), once humans colonize the moon, will the lunar inhabitants experience "day" and "night" on the moon?

4051 upvotes • wuapinmon

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Do human beings make noises/sounds that are either too low/high frequency for humans to hear?

4047 upvotes • rossatron688

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
How can I obtain ethanol 100% if at 95.4% is considered an azeotrope?	4070	AMOR17
If the universe is expanding, isn't all matter/energy in the universe expanding with it?	4068	Brandacle
Why does the ice in my ice cube tray sometimes climb upwards as if on an invisible wire?	4068	greyballwoodsmall
Where does house dust come from?	4064	4fecta_Gaming
How do you know a dated-at 1 million year old hammer wasn't 0.9999 million year old rock that was just made into a hammer in the last 0.0001 years?	4061	jgaldjsaglwo4yn4owmg
What is the physical difference in the brain between an objectively intelligent person and an objectively stupid person?	4060	flaminghotcheetos123
What’s the largest star system in number of planets?	4056	sometimeonabench
AskScience AMA Series: We are Cosmologists, Experts on the Cosmic Microwave Background, Gravitational Lensing, the Structure of the Universe and much more! Ask Us Anything!	4054	AskScienceModerator
If the moon's spin is tidally-locked so that it's synchronized with it rotational rate (causing it to almost always look the same from Earth), once humans colonize the moon, will the lunar inhabitants experience "day" and "night" on the moon?	4051	wuapinmon
Do human beings make noises/sounds that are either too low/high frequency for humans to hear?	4047	rossatron688