On Thursday, as Bulletin members celebrate the clock’s 75th anniversary, they will update the time again, when it could tick slightly toward or away from the apocalypse.“The Doomsday Clock has been called the most iconic piece of graphic art of the 20th century, and I think it’s proving to be as powerful in the 21st.

His latest paper, The Vulnerable World Hypothesis , widens the lens to look at other ways technology could ultimately devastate civilization, and how humanity might try to avoid that fate.