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- A mind for math: A part of the brain associated with making memories may also predict success in learning math
- Teens take home science gold: A low-cost, self-driving vehicle; battery alternatives and analyses of galaxy clusters claim top prizes at a global high school science competition
- Flagging loose bolts: “Smart alert washer” automatically flags when a nut is coming loose, warning of potential danger
SECRETLY THE SAME
Though these knots look different, mathematicians consider them the same. Twisting and pulling just the right way,without ever cutting the string, will make them look identical.
Credit: Video by Rob Scharein using software downloadable from www.KnotPlot.com.
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