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 science that guides the Doomsday Clock, which represents how close humanity is to global catastrophe, has been moved to 89 seconds to midnight, the closest it has ever been.

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.