DOUGLAS FARMER, SENIOR EDITOR [email protected]Although it can be difficult to get heart muscle cells to propagate in large numbers, a team of researchers at the University of Minnesota has found a way to use 3D printing and light-induced excitation to create a living heart pump that has broad implications in medicine. Historically, scientists have attempted to 3D print cardiomyocytes, heart muscle cells from stem cells, but could never reproduce them in sufficient numbers to establish their functionality. 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Products...Photonics Buyers' GuideFresnel Technologies Inc.Fresnel Technologies Inc. is an expert manufacturer of molded plastic optics, including Fresnel lenses and related optical components, as well as infrared transmitting materials and optics made from...Photonics Buyers' Guide