This musical map, by Japanese artist Isao Hashimoto, presents all 2,053 nuclear tests and explosions that took place between 1945 and 1998, at a rate of one month per second. Each nation is represented by a different tone.

Hashimoto said, “I created this work for the means of an interface to the people who are yet to know of the extremely grave but present problem of the world.”

He undertook the work in 2003, so it doesn’t reflect North Korea’s tests in 2006 and 2009.

(Thanks, Larry.)