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Radio, Dynamite & Avogadro's Number: This Week In Science History (PHOTOS)

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Guglielmo Marconi, the inventor of radio, sits with an early version of his transmitter and receiver.
Guglielmo Marconi, the inventor of radio, sits with an early version of his transmitter and receiver.

July 9-15 will be a busy week in science history. This week sees the anniversary of a patent that changed the world—and that's just the beginning.

The week, we also commemorate several space milestones, from the first close-up picture of Mars to the publication of a bizarre (and famously wrong) theory of the solar system. It's also an explosive week for Swedish chemist Alfred Nobel, who appears twice on the list.

What else in science history happened this week? Check out the slideshow for all the landmark events.

This Week In Science History, July 9-15
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