Top of the Decade

> Perfection of the first working model of a laser, 1960.

> Franc,ois Jacob and Jacques Monod formulate the gene represser theory, which correctly explains how genes are turned "on" and "off," 1961.

> Murray Gell-Mann develops the "eightfold way" to explain the relationships between subatomic particles, 1961.

> Genetic code of the DNA molecule is broken by Marshall Nirenberg and J. Heinrich Matthaei, 1961.

> Maarten Schmidt discovers that quasars may be the most distant objects in the universe, 1963.

> Mariner transmits close-up photographs of Mars, 1965.

> Discovery of cosmic background radiation believed to be remnants of "Big Bang" that created the universe, 1965.

> First scientific proof of continental drift by sea-floor spreading, 1966.

> Discovery of pulsars, 1967.

> Man's first landing on the moon, 1969.

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