Who had a hit with "In The Year 2525"?

"In the Year 2525" is a 1969 hit song by the American pop-rock duo of Zager and Evans. It reached number one on the Billboard Hot 100 for six weeks commencing July 12, 1969. It peaked at number one in the UK Singles Chart for three weeks in August and September that year. The song was written and composed by Rick Evans in 1964 and originally released on a small regional record label (Truth Records) in 1968. Zager and Evans disbanded in 1971.

It is unusual for a recording artist to have a number one hit and then never have another chart single. Zager and Evans are the only act to do this in both the U.S. Billboard Hot 100 and the UK Singles Chart. Their follow-up single on RCA-Victor, "Mr. Turnkey" (a song about a rapist who nails his own wrist to the wall as punishment for his crime), failed to hit the main music charts on either side of the Atlantic Ocean. Another single, "Listen to the People", managed to make the bottom slot of the Cashbox chart at number 100.