New work on the problem of “scissors congruence” explains when it’s possible to slice up one shape and reassemble it as another. If you have two flat paper shapes and a pair of scissors, can you cut ...

Using a combination of guillotine-based experiments and cutting-edge computer modeling, researchers have explored the most efficient ways for teeth to slice food. Their results show just how precisely ...

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“If you have hands, you can do woodwork,” promises Paterson (First Art Kit) in this encouraging primer. Offering a rundown of required tools, she explains that handsaws are best for cutting large ...