在第十五届中国国际航空航天博览会上的国家航天局“中国航天”展台，嫦娥六号任务取回的月球背面月壤样品首次向国内公众展出。

Just before U.S. Sen.-elect Ruben Gallego formally declared victory over Republican rival Kari Lake, one of her allies posted on social media a message hinting at something amiss in the race.

Using 400,000 high-resolution digital photographs, taken with drones, cameras and lasers over four weeks when no one was in ...