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Cycles: Nature's Time Clocks

Our lives are ruled by cycles—night and day, the seasons, a biological rhythm within our own bodies, and many other rhythms.

Edward Russell Dewey (1895–1978) was a Harvard economist who had identified a number of cycles in the U.S. economy and started the...

Stargazing: Finding the Stars and Constellations

Thousands of years ago, people spent hours gazing at the night sky. They found that by connecting the stars as if they were dots, patterns emerged that resembled animals, people and things.

Saturn, the Real Lord of the Rings

Saturn, the sixth planet from the Sun, is named for the Roman god of agriculture. In Greek mythology, Saturn became the ruler of the universe when he led a successful rebellion against his father, Uranus.

Man's fascination with Saturn started in 1610, when Galileo pointed...