This 20-cent whirligig toy can replace a $1,000 medical centrifuge

 Centrifuges are found in medical labs worldwide. But a good one could run you a couple grand and, of course, requires electricity — neither of which are things you’re likely to find in a rural clinic in an impoverished country. Stanford researchers have created an alternative that costs just a few cents and runs without a charge, based on a children’s toy with surprising… Read More