The threat of an asteroid hitting Earth is always there, but the danger of falling space junk is growing into a crisis.

YR4, which recently caused concern over the possibility of it impacting Earth, has been the subject of extensive tracking ...

But despite their far-flung destination, and the danger and romance of space travel, when it comes to pay, Ms. Williams and Mr. Wilmore are treated effectively like any other government employee ...

What was left under the rubble of a fireworks explosion in Pacoima was a toxic stew of chemicals authorities said could react unpredictably with water and was too dangerous to move.

Richard O. Ocaya is a physicist at the University of the Free State, Phuthaditjhaba, South Africa. At 3 p.m. on 30 December last year, residents of Mukuku village in Makueni county, Kenya, were ...