Ingrid Fritsch, a professor of chemistry and biochemistry at the University of Arkansas, developed a new method—called magnetohydrodynamics—of using magnetic force to move fluids down small channels the width of a human hair. It is unlike current methods using electrokinetic pumping, centrifugal force, and mechanical pumping with microfluidic devices. Fritsch found that when the electromagnetic field is reversed in magnetohydrodynamics, the fluid flow reverses without need of mechanical manipulation. The finding may help researchers develop so called "lab on a chip" medical devices.
A make-your-own Star Wars Sith Lightsaber hilt is heftier and better-looking than most others out there, according to its maker, Sean Charlesworth. You can 3D print it from free source files, and there's even a hardware kit available -- not free -- so you can build one just in time for Halloween.
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