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An Aquarius born February 7 is symbolized by the Water Bearer and has a private, secretive nature. Learn about February 7 birthday astrology.

A Cancer born July 21 is symbolized by the Crab and is extremely sensitive. Learn about July 21 birthday astrology.

A Pisces born on February 19 is symbolized by the Fish and has a restless, emotionally fragile nature. Learn about February 19 birthday astrology.

A Pisces born on February 23 is symbolized by the Fish and has a fanciful, imaginative personality. Learn about February 23 birthday astrology.

A Pisces born on March 7 is symbolized by the Fish and has a creative, sensitive, empathetic nature. Learn about March 7 birthday astrology.

A Pisces born on March 11 is symbolized by the Fish and has a gentle yet determined personality. Learn about March 11 birthday astrology.

A Pisces born on March 13 is symbolized by the Fish and has a talented yet erratic nature. Learn about March 13 birthday astrology.

Cicada singing is often associated with hot summer afternoons. Why do cicadas make so much noise? Learn about cicada singing and cicada songs.

How is sound recorded on motion picture film?

Since a torpedo cannot have an air-breathing engine like a boat, how is it propelled through the water?

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