A new microscope offers an unprecedented view of how mammals are built, cell by cell. Scientists tracked the development of a mouse embryo with the microscope, mapping the life history of every cell. (Learn more: https://www.sciencenews.org/article/see-these-dazzling-images-growing-mouse-embryo) | Science News Magazine

For the first time, scientists have seen nerve cells being born in the brains of adult mice. Over two months (days indicated by the numbers), two individual stem cells in an adult mouse’s hippocampus jump into action and produce offspring in the clip above. (Read more: https://www.sciencenews.org/article/watch-nerve-cells-being-born-brains-living-mice) | Science News Magazine