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A critically endangered South China tiger ( Panthera tigris amoyensis ) has killed another of its kind, sad news for efforts to save this rarest tiger subspecies from extinction. The death took place at the Laohu Valley Reserve in South Africa, where the organization Save China’s Tigers maintains a conservation project to breed South China tigers and teach them to hunt and survive in the wild, a process known as “rewilding.” The eventual goal is to release some of these tigers back into a reserve in China. [More]

Researchers are able to achieve extremely high-resolution microscopy through a process known as stimulated emission depletion (STED) microscopy. This cutting-edge imaging system has pushed the performance of microscopes significantly past the classical limit, enabling them to image features that are even smaller than the wavelength of light used to study them. They are able to achieve this extreme vision by using a single-color fluorescent dye that absorbs and releases energy, revealing cells and cellular components (such as proteins) in unprecedented detail.