Atomic scientists set their "Doomsday Clock" on Tuesday closer than ever to midnight, citing aggressive behavior by nuclear powers Russia, China and the United States, fraying nuclear arms control, co...

The “Doomsday Clock,” which metaphorically rates how close humankind is to destroying itself, is now at 85 seconds to midnight, atomic scientists say.

Those factors include nuclear annihilation as well as climactic disasters; AI advancing faster than the ability to govern it; biological risks and spread of disease; the rise of autocracies; and proli...