Imagine hitting a hanging punching bag. A significant part of the impact travels through the bag, causing it to swing back and forth. Now replace the punching bag with a down pillow. This softer, less dense target absorbs most of the shock instead of transmitting it. The pillow swings a little, but deforms a lot. The
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You’ve probably seen how oil and water get along (or don’t), but did you know that this behavior could help control oil spills and alleviate desert water shortages? Oil isn’t the only substance that doesn’t want to associate with water. One innovation that has harnessed the power of water resistance is hydrophobic (“water-fearing”) sand. Marketed
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