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This is Scientific American 60-Second Science. I'm Cynthia Graber. This'll just take a minute.

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Windows can offer beautiful natural light.

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But on bright days, the sunlight can bake a room.

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That trapped heat drives up air conditioning use and energy costs.

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Now, a team of researchers at Harvard's Wyss Institute for Biologically Inspired Engineering has designed cooler windows by mimicking nature.

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When animals get hot, tiny capillaries near the surface of the skin dilate.

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Circulating blood helps transfer the body heat out to the air.

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In that spirit, the researchers created a super-thin silicone-rubber layer with a network of tiny sealed channels.

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When the rubber is stretched over a window, it's completely transparent.

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Water running through the channels absorbs heat and transfers it to the outside air.

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In the researchers' model, a large window at 100 degrees Fahrenheit can be lowered to a much more manageable 86 degrees.

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And the energy needed to pump the water is far less than what would be needed to cool the room equivalently with air conditioning.

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The research is in the journal Solar Energy Materials and Solar Cells.

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The team is working with architects to model energy savings if the microfluidic channels were included in an entire building's windows.

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Which could warm consumers' hearts.

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Thanks for the minute, for Scientific American 60-Second Science. I'm Cynthia Graber.

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