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,

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.

The Doomsday Clock now stands at 89 seconds to midnight, the closest to catastrophe in its nearly eight-decade history. Here's a look at how — and why — it's moved.