U.S. stocks tick down as Apple drags tech sector lowerChina launches new Earth observation satelliteU.S. stocks post weekly gains amid tax bill, dataXi Meets IOC PresidentMajor lithium reserves discovered in SichuanCuriosity mars rover begins studying Vera Rubin RidgeChina's FAST telescope identifies over 300 pulsarsFour Long March 11 launches by sea plannedChina steps up development of intelligent vehiclesUC Berkeley to host conference on gene