The Doomsday Clock, a symbol of global danger, remains the closest it has ever been to midnight. Scientists warn climate change and nuclear threats keep humanity on high alert.

And even though the clock evokes a potentially terrifying future, Holz takes a more optimistic approach to the entire endeavor. “Really, the Doomsday Clock is a symbol of hope,” Holz says. “The whole ...

The stewards of the clock meet annually to discuss re-setting the clock based on current world events. The Doomsday Clock was previously set at 100 seconds to midnight in 2020.

Jan. 14, 2010 -- Is humanity approaching an apocalypse? Today, a group of international scientists will move the hands of the symbolic "Doomsday Clock" for the first time in two years.