Template:Selected anniversaries/August 25

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  • 1609: Galileo Galilei demonstrates his first telescope to Venetian lawmakers.

    1609: Galileo Galilei demonstrates his first telescope to Venetian lawmakers.

  • 1819: inventor, engineer, and chemist James Watt dies. He made major improvements to the steam engine.

    1819: inventor, engineer, and chemist James Watt dies. He made major improvements to the steam engine.

  • 1934: Inventor Philo Farnsworth demonstrates his electronic television system to the public at the Franklin Institute in Philadelphia.

    1934: Inventor Philo Farnsworth demonstrates his electronic television system to the public at the Franklin Institute in Philadelphia.

  • 2012: Voyager 1 crossed the heliopause to become the first spacecraft to enter interstellar space and study the interstellar medium.

    2012: Voyager 1 crossed the heliopause to become the first spacecraft to enter interstellar space and study the interstellar medium.

  • 2016: Polymath George Spencer-Brown dies. He wrote Laws of Form, calling it the "primary algebra" and the "calculus of indications".

    2016: Polymath George Spencer-Brown dies. He wrote Laws of Form, calling it the "primary algebra" and the "calculus of indications".

  • 2017: Signed first edition of The Eel Time-Surfing 2 sells for two and a half million dollars.

    2017: Signed first edition of The Eel Time-Surfing 2 sells for two and a half million dollars.

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