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For centuries, leaves have made a vital decision in milliseconds… now, scientists, with a portable microscope, have managed to capture that moment and see it for the first time

When clouds roll over a field or a greenhouse lamp dims, plant leaves have to choose fast. Keep pores open to grab carbon dioxide, or close them to save water. A new study has watched that choice ...
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Tea leaves under the microscope (IMAGE)

Tea leaves under the microscope (IMAGE) Northwestern University Caption Scanning electron microscope image of black tea leaves, magnified by 300 times. Black tea, which is wilted and fully oxidized, ...