The Doomsday Clock that tracks humanity’s threat to survival was moved 20 seconds closer to midnight – its closest point in its 73-year existence. The Bulletin of the Atomic Scientists, which formed after the creation of the atomic bomb during World War II, moved the clock Thursday from two minutes to midnight to 100 seconds to midnight. The group decided to make the advance because of nuclear and climate dangers that are compounded by cyberthreats. The clock last moved in 2018 when it advanced 30 seconds from 2 1/2 minutes to midnight to two minutes to midnight.