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Math

Prime Pursuit

A novel approach for identifying prime numbers provides a long-sought improvement in the theoretical efficiency of prime-detecting algorithms.

Humans

From the May 3, 1930, issue

MOON’S SHADOW AT ECLIPSE PHOTOGRAPHED Clouds over the sun broke away at Camptonville, Yuba County, California, two minutes before the total phase of the solar eclipse of the sun. Only the lightest haze remained, and the observations planned by the various expeditions located there were carried through successfully. The Lick Observatory-Crocker expedition under the direction […]

Astronomy

A Hubble Decade

To celebrate the Hubble Space Telescope’s 10th anniversary, the Space Telescope Science Institute in Baltimore, Md.,