00:00 On this day in space.
00:03 In 1976, the Soviet space program launched its last moon mission.
00:07 Luna 24 was a robotic sample return mission and the third of its kind.
00:11 It lifted off on a Proton K rocket from the Baikonur Cosmodrome in Kazakhstan
00:15 and safely landed on the lunar surface nine days later.
00:18 The probe landed in a dark plane known as Mer Cresium, or the Sea of Crises,
00:23 and collected six ounces of soil samples, which it brought back to Earth on August 22.
00:28 Scientists later found that the soil samples from Luna 24 contained tiny traces of water,
00:33 about 0.1 percent by mass.
00:36 And that's what happened on this day in space.
00:39 [ ♪ ]
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