Article: 250 years of Russian science & technology. (chronology) (Illustration)

1799 Frozen In Time

Aperfectly preserved 33,000-year-old woolly mammoth is found frozen in the Siberian Lena River Delta.

1902 Drool On Cue

Ivan Petrovich Pavlov formulates the law of reinforcement; he demonstrates that a dog given food when a bell is rung will soon learn to salivate at the sound of the bell alone.

1975 Space Meeting

The first cooperative U.S.-Soviet space mission, the Apollo-Soyuz Test Project, is launched; a three-man Apollo spacecraft docks with the two-man Soviet Soyuz 19.

1991 Return To Titanic

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