/r/askscience

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What are the biggest lost collections of knowledge in human history?

2164 upvotes • Solideus

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If the Universe keeps expanding at an increasing rate, will there be a time when that space between things expands beyond the speed of light?

2164 upvotes • nikolaibk

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At what concentration of aqueous caffiene or alcohol would the dehydrating effects of the drug be balanced out by the hydrating effects of the liquid?

2163 upvotes • Waja_Wabit

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AskScience AMA Series: We're scientists on a NOAA mission to explore the deep, unseen waters off Hawaii. Ask Us Anything!

2162 upvotes • NOAAgov

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How do computers keep track of time passing?

2162 upvotes • blorgbots

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American Chemical Society AMA: I am Gerry Wright, Director of the Michael G. DeGroote Institute for Infectious Disease Research at McMaster University and Associate Editor of ACS Infectious Diseases. Ask me anything about antibiotic resistance and antibiotic discovery.

2161 upvotes • AmerChemSocietyAMA

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Has the speed of sound ever been surpassed underwater? What would an underwater sonic boom be like?

2161 upvotes • mlukeman

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[deleted by user]

2161 upvotes • [deleted]

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Have we observed objects orbiting around the sun in the 'wrong direction'?

2159 upvotes • hamsterdave

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Why do antigen rapid tests not work after 15 minutes?

2159 upvotes • quillqueer

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Title	Upvotes	Author	Mark as read	Favorited	Rating	Add to a list
What are the biggest lost collections of knowledge in human history?	2164	Solideus
If the Universe keeps expanding at an increasing rate, will there be a time when that space between things expands beyond the speed of light?	2164	nikolaibk
At what concentration of aqueous caffiene or alcohol would the dehydrating effects of the drug be balanced out by the hydrating effects of the liquid?	2163	Waja_Wabit
AskScience AMA Series: We're scientists on a NOAA mission to explore the deep, unseen waters off Hawaii. Ask Us Anything!	2162	NOAAgov
How do computers keep track of time passing?	2162	blorgbots
American Chemical Society AMA: I am Gerry Wright, Director of the Michael G. DeGroote Institute for Infectious Disease Research at McMaster University and Associate Editor of ACS Infectious Diseases. Ask me anything about antibiotic resistance and antibiotic discovery.	2161	AmerChemSocietyAMA
Has the speed of sound ever been surpassed underwater? What would an underwater sonic boom be like?	2161	mlukeman
[deleted by user]	2161	[deleted]
Have we observed objects orbiting around the sun in the 'wrong direction'?	2159	hamsterdave
Why do antigen rapid tests not work after 15 minutes?	2159	quillqueer