doomsday clock

Earth, for the second year running, is nearing apocalypse, a science-oriented advocacy group said, pointing to its famous "Doomsday Clock" that shows 90 seconds till midnight.

The two-minute warning that had held over the past two years has now shrunk to 100 seconds before midnight on the Doomsday Clock set by the Bulletin of the Atomic Scientists.

Scientists who assess threats each year and express their concerns using the clock are worried about President Trump's unpredictability and governments' failure to trust each other.

Criticizing President Trump, the Bulletin of the Atomic Scientists sees increased risk in dangers to humanity, from the proliferation of nuclear weapons to climate change.

Despite the progress represented by the Iran nuclear deal, rising tensions between the U.S. and Russia, North Korea's nuclear tests and other conflicts mean the world is still close to catastrophe.