The symbolic Doomsday Clock edged closer to apocalypse on Tuesday, set at 85 seconds to midnight by scientists citing escalating risks from nuclear weapons, climate change, artificial intelligence, an...

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...