Word: first
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Dates: during 1960-1969
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...geometry of space, diameter is a naive measurement; normal concepts of shape are meaningless. Astronomers were also nettled by the way that NASA released its information. Ignoring the scientific community, the space agency has to date published its conclusions only in a press release that was issued on the first anniversary of OAO-II's launch. "Remember," said Caltech's Jess Greenstein, "you're studying a public relations report, not a scientific paper...
...Perfection of the first working model of a laser...
...First scientific proof of continental drift by sea-floor spreading...
...first landing on the moon...
...California enacts the nation's first law to reduce auto fumes, the chief source of air pollution...