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.

WASHINGTON — Earth is moving closer to destruction, a science-oriented advocacy group said Tuesday as it advanced its famous “Doomsday Clock” to 89 seconds till midnight, the closest it has ...

Former Colombian President Juan Manuel Santos, left, and bulletin of the atomic scientists member Robert Socolow reveal the Doomsday Clock (Image ... from counting down the minutes until midnight ...