A science-oriented advocacy group says the Earth is moving closer to destruction. The Bulletin of the Atomic Scientists said Tuesday that they've moved their “Doomsday Clock” to 89 seconds to midnight,

Douglas McIntyre explains the history and significance of the Doomsday Clock, which was recently set to 89 seconds to midnight—the closest ever. Originally created by atomic scientists, the clock now reflects growing concerns about climate change,

The Bulletin of the Atomic Scientists shifted the hands of the symbolic clock to 89 seconds to midnight, citing the threat of climate change, nuclear war and the misuse of artificial intelligence.