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Random Fridays: Ultraviolet leaves

purple-leaves

Ultraviolet salad, anyone?

There’s a salad store in a food court near my office that has a display of leaves growing in boxes all along one wall. During the day the plants are the usual plant-like green, but at night, when most of the lights are turned off, they glow a peculiar violet colour in what I assume is special nocturnal lighting just for them.


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