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 E-Mail IMAGE: Fingerprint patterns made in blood are clearly visible on aluminum foil (left) and painted wood (right) when developed with a fluorescent polymer. view more  Credit: Adapted from 2021, DOI: 10.1021/acsami.1c00710 Careful criminals usually clean a scene, wiping away visible blood and fingerprints. However, prints made with trace amounts of blood, invisible to the naked eye, could remain. Dyes can detect these hidden prints, but the dyes don't work well on certain surfaces. Now, researchers reporting in ACS Applied Materials & Interfaces have developed a fluorescent p...

Credit: Weizhi Ji, Kunming University of Science and Technology Investigators in China and the United States have injected human stem cells into primate embryos and were able to grow chimeric embryos for a significant period of time--up to 20 days. The research, despite its ethical concerns, has the potential to provide new insights into developmental biology and evolution. It also has implications for developing new models of human biology and disease. The work appears April 15 in the journal Cell. "As we are unable to conduct certain types of experiments in humans, it is essential that we ...