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Woman shares creative way to use old toilet paper rolls to help animals: 'Love this idea'"I'm 100% doing this!" Woman shares creative way to use old toilet paper rolls to help animals: 'Love this idea' first appeared on The Cool Down.
NPR's Ailsa Chang talks with Emily Kwong and Regina Barber of Short Wave about the fluid dynamics of crowds, an early fossil of a modern bird and new data on how people's moods change through the day.
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