Inspired by a pond microorganism that retracts its spiral stalk using geometry alone, soft gel helices now wind and unwind on their own to amplify motion.
VnExpress International on MSN
After 400 practice tests in 18 months, Vietnamese student nails perfect 1600 on SAT
Nguyen Tuan Anh, a 16-year-old junior in Hanoi, fell 30 points short of perfection on his first SAT. He spent the next three months dissecting what went wrong, then walked into his second attempt and ...
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