I think that blurb is referencing the Doomsday Clock:

the Clock is a metaphor, not a prediction, for threats to humanity from unchecked scientific and technological advances. That is, the time on the Clock is not to be interpreted as actual time. A hypothetical global catastrophe is represented by midnight on the Clock, with the Bulletin’s opinion on how close the world is to one represented by a certain number of minutes or seconds to midnight, which is then assessed in January of each year.