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Key dates in science

Francis Crick and James Watson discovered the structure of the DNA molecule, which forms living cells, later proved by Rosalind Franklin.

The first satellite, the Russian Sputnik I, was launched.

The integrated circuit was invented in the U.S.A.

Vostok I, the first manned spacecraft, was launched. Yuri Gagarin became the first person to travel into space.

An American astronaut, Neil Armstrong, became the first person to walk on the Moon.

The Internet, in the form of ARPANET, an American military computer network, was born.

LESSON 16

Grammar.

Text 16A.Descending to New Ocean Depths

Text 16B.Types of Submersibles

Topic.Money


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