White Blood Cells Solve Traveling-Salesman ProblemForget GPS. With no fancy maps or even brains, immune system cells can solve a simple version of the traveling-salesman problem, a computational conundrum that has vexed mathematicians for decades. [partner id="sciencenews" align="right"]The new research, which simulates how a type of white blood cell seeks and destroys infectious particles, shows how living things -- be they cells, sharks or bees
