CCI ARCHIVES / SCIENCE PHOTO LIBRARY CCI ARCHIVES / SCIENCE PHOTO LIBRARY
Christiaan Huygens (1629 - 1695). Historical engraving of the Dutch astronomer and mathematician Christiaan Huygens with his pendulum clock. Huygens invented the pendulum clock, founded the wave theory of light, and discovered the rings of Saturn. From Weltall und Menscheit (Universe and Humanity), by Hans Kraemer (ca.
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