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National Waterpark Day: Keeping score

Libbi and Adaleigh head out to Kalahari Resorts & Conventions for National Waterpark Day.

Scientists built wind turbine blades 80% lighter that spin faster, thanks to a 4D-printing trick almost no one saw coming

Scientists created 4D-printed wind turbine blades that are 80% lighter and spin faster, opening a new path for wind energy.