If you twist something — say, spin a top or rotate a robot’s arm — and want it to return to its exact starting point, ...
Mathematicians thought that they understood how rotation works, but now a new proof has revealed a surprising twist that makes it possible to reset even a complex sequence of motion ...
The 1982 SAT infamously held a math question so tricky that even its creators didn’t include a correct answer. The botch required the rescoring of 300,000 exams, scholastic victims of the knotty coin ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results