Three of the world’s longest-running scientific experiments,

Three of the world’s longest-running scientific experiments, including an electric bell that’s been ringing since 1840 and a self-winding barometrically powered clock.

Update: Another long-running experiment: “Researchers at Michigan State University are growing and examining seedlings that have sprouted from seeds buried 120 years ago on campus. They’ve been doing this roughly every five years since 1879, when William Beal, a professor of botany at what then was Michigan Agricultural College, buried them in anticipation of learning how long seeds can remain viable.” (thx, susan)

Update: There are several “long now” experiments at Rothamsted Research involving soil and fertilizer. (via kircher)

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