'Doomsday' clock remains at three minutes to midnight: What does it mean
The "doomsday" clock serves as a metaphor for how close humanity is to destroying the planet.
Jan 27, 2016, 02:41 AM IST
The "doomsday" clock serves as a metaphor for how close humanity is to destroying the planet.
Jan 27, 2016, 02:41 AM IST