In science news around the world, as cases of coronavirus disease 2019 rise globally, scientists step up research on the disease while other work is suspended and labs are closed. Companies race to develop tests for severe acute respiratory syndrome coronavirus 2 that return results more quickly. The Cambodian government suspends for 10 years plans to build two hydropower dams on the Mekong River, one of the most biologically diverse freshwater ecosystems. A French sociologist jailed in Tehran, Iran, since June 2019 is freed in exchange for an Iranian engineer held in France. Almost 21 years after its debut, SETI@home—a pioneering citizen science effort to employ idle home computers to sift radio signals for alien messages—will end this month. Daniel Greenberg, a journalist who pioneered coverage of the intersection of science and politics and was an influential early leader of Science‘s News section, dies at the age of 88.