What is the optimal amount of water to clean a glass jar? part 2
There are lessons to be learned from how chemists wash reaction products, explains one reader.
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This week鈥檚 new questions
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As pure as driven snow? Not if you’re a ‘CleanTok’ influencer
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Tom Gauld on a new way to think of cloud-based storage
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Twisteddoodles on experimentation dreams vs reality
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What is the optimal amount of water to clean a glass jar?
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What would the horizon and landscape look like on a disc-shaped world?
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This week鈥檚 new questions
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How to convey amounts of snow to Canadians: use polar bears
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Life
Dive below the waves with these award-winning underwater photographs
From clownfish to a California newt, here are some of the images to make the cut in the Underwater Photographer of the Year contest 鈥� including the stunningly cute overall winner
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Tom Gauld on whether to disturb the professor
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Twisteddoodles: Is the sun your boss?
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Space
Amazing sneak peek of NASA’s spacesuit tests as moon mission nears
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Why don鈥檛 orcas attack humans?
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