As of 10am this morning, the Doomsday Clock stood at two minutes to midnight. The clock was created by the Bulletin of the Atomic Scientists to illustrate how close humans might be to the end of the world. Originally, it only showed nuclear threats, but in recent years, climate change has moved the clock.
Why it matters: The last time the clock was this close to midnight was in 1953. The U.S. and Soviet Union had just tested hydrogen bombs. These scientists feel the risk of annihilation is as great today as it was then.