Reserve advance tickets and save $2 per person on Museum Entry.

One of the most provocative symbols of the 20th century—the Doomsday Clock—inspires an exhibit illustrating why it matters as much today as it ever has in its 70-year history.

Presently set at just two-and-a-half minutes to midnight, the Doomsday Clock reflects the urgency of two major challenges confronting our world: nuclear weapons and climate change. Turn Back the Clock calls upon all of us—scientists, policy makers and ordinary citizens—to take part in the dialogue and debate about the important science and technology issues that have great impact on our lives.

Included in Museum Entry. Open through early 2018.