Scientists and global leaders revealed on Tuesday that the "Doomsday Clock" has been reset to the closest humanity has ever come to self-annihilation.

The Bulletin of the Atomic Scientists set the symbolic Doomsday Clock at 89 seconds to midnight on Jan. 28. ↓ Read More

The Bulletin of the Atomic Scientists set the clock to 89 seconds before midnight - the theoretical point of annihilation. That is one second closer than it was set last year. The

The Bulletin of the Atomic Scientists cited climate change, instability in the Middle East and the threat of pandemics as reasons the Earth is closer than ever to total destruction.