Nearly 4,000 NASA employees have opted to leave the space agency through the Trump administration's deferred resignation program, NASA said on Saturday.

The US space NASA will lose about 3,900 employees under Donald Trump's sweeping effort to trim the federal workforce - at the same time as the president prioritizes plans for crewed missions to the ...

He recently added a new mystery to the list: Is China quietly building the world’s biggest telescope? He would like to know, ...