Stuck for a romantic science gift? You’ll have to be fast


If you’re very quick you can make your own rain­bow roses, or other flowers. You’ll need a white rose, some food col­our­ing, a knife to split a stem and some time. +Anne Osterrieder has the details at AoB Blog.

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Roses are red — but they don’t need to be, if you know how to use food dyes and Fibonacci
Valentine’s Day is here and unless you share the cyn­ics’ view that this is a hol­i­day inven­ted by the flower industry, you might set off to buy a bunch of flowers for your other half on the day. Nex.…..

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