From breakthroughs in computing to a new Ebola research program in Japan, senior physical sciences reporter Davide Castelvecchi of Nature News explains some of the top science stories of recent weeks: Google published evidence that they’ve achieved quantum supremacy … and, yes, that’s a technical term, not just overblown techno-bragging. A modified version of the CRISPR gene editing system , known as CRISPR Prime, could make the technology less error-prone, and effective in a wider array of cell