1642 in science

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The year 1642 in science and technology involved some significant events.

Technology

• The printmaking process of mezzotint is developed by Ludwig von Siegen.
• The Pascaline, one of the earliest mechanical devices for calculating, is invented by Blaise Pascal to help with the recording of taxes.

Exploration

• November 24 - Abel Tasman, Dutch explorer, sights Tasmania, which he names Anthoonij van Diemenslandt.

Births

• December 25 (OS) - Isaac Newton, polymath (d. 1727)

Deaths

• January 8 - Galileo Galilei, astronomer (b. 1564)