Which of the following challenged the traditional belief that the orbits of the planets were spherical, showing that the five known planets moved around the sun in elliptical paths?

a. René Descartes
b. Galileo Galilei
c. Johannes Kepler
d. Antoni van Leeuwenhoek

Answer: c

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The Great Wall of Los Angeles (fig. 24.6) was begun in 1982

Indicate whether the statement is true or false.

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From which important song class in Indian culture is this listening example?

A. agricultural song B. ceremonial dance C. Ghost Dance Song D. healing song

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