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1643 in science
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<h2 id="exploration">Exploration</h2> <ul><li>January 21 – <a href="/facts/Abel_Tasman/aCTnVswB">Abel Tasman</a> discovers the <a href="/facts/Tonga/oX5vwTer">Tonga</a> <a href="/facts/Archipelago/50BeC9tl">archipelago</a>.</li> <li>December 25 – Captain William Mynors of the <a href="/facts/British_East_India_Company/jpfw533d">British East India Company</a> discovers <a href="/facts/Christmas_Island/K6JQ6MKf">Christmas Island</a>.<a class="footnote-ref" id="fnref:1" href="#fn:1"><sup>1</sup></a></li></ul> <h2 id="meteorology">Meteorology</h2> <ul><li><a href="/facts/Evangelista_Torricelli/x4Lzw0PK">Evangelista Torricelli</a> invents the <a href="/facts/Mercury_(element)/WlxfoHva">mercury</a> <a href="/facts/Barometer/M8VQc69q">barometer</a>.<a class="footnote-ref" id="fnref:2" href="#fn:2"><sup>2</sup></a></li></ul> <h2 id="births">Births</h2> <ul><li>January 4 (<a href="/facts/Old_Style_and_New_Style_dates/kb3020Wy">NS</a>) – <a href="/facts/Isaac_Newton/4L7gTncN">Isaac Newton</a>, English <a href="/facts/Physicist/cQcgvSIm">physicist</a> (died <a href="/facts/1727_in_science/kbTxAc8A">1727</a>)</li> <li><a href="/facts/Jean_de_Fontaney/blluUfwm">Jean de Fontaney</a>, French <a href="/facts/Jesuit/n0PeYBB8">Jesuit</a> <a href="/facts/Mathematician/eaFSR8Fx">mathematician</a> and <a href="/facts/Astronomer/ronF8j4a">astronomer</a> (died <a href="/facts/1710_in_science/st7s4WJt">1710</a>)</li> <li><a href="/facts/Pierre_Dionis/vGB2bzzx">Pierre Dionis</a>, French <a href="/facts/Surgeon/Hm0R9t6n">surgeon</a> and <a href="/facts/Anatomist/p8TCWJuV">anatomist</a> (died <a href="/facts/1718_in_science/P9kI2Kqv">1718</a>)<a class="footnote-ref" id="fnref:3" href="#fn:3"><sup>3</sup></a></li></ul> <h2 id="deaths">Deaths</h2> <ul><li>April 9 – <a href="/facts/Benedetto_Castelli/R5SGAB3L">Benedetto Castelli</a>, Italian mathematician (born <a href="/facts/1578_in_science/QSzkopFJ">1578</a>)</li> <li>November 3 <ul><li><a href="/facts/John_Bainbridge_(astronomer)/KSDpsf9q">John Bainbridge</a>, English astronomer (born <a href="/facts/1582_in_science/9vnkR7A0">1582</a>)</li> <li><a href="/facts/Paul_Guldin/Se72TAt3">Paul Guldin</a>, <a href="/facts/Swiss_people/3ecWX2K6">Swiss</a> mathematician and astronomer (born <a href="/facts/1577_in_science/lohzAVQv">1577</a>)</li></ul></li> <li><a href="/facts/Sophia_Brahe/MCQILn0E">Sophia Brahe</a>, <a href="/facts/Danish_people/rukzp11N">Danish</a> astronomer (born <a href="/facts/1556_in_science/fKo79hy2">1556</a>)</li> <li><a href="/facts/Gasparo_Berti/H7tLy8mY">Gasparo Berti</a>, Italian mathematician, astronomer and physicist (born c. 1600)</li> <li><a href="/facts/Walter_Warner/JDPgaRrJ">Walter Warner</a>, English scientist (born <a href="/facts/1563_in_science/WrUVIIwp">1563</a>)</li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>"Christmas Island history". Australian Government, Department of Sustainability, Environment, Water, Population and Communities. 2011-11-02. Archived from the original on 2012-03-04. Retrieved 2011-12-09. <a href="https://web.archive.org/web/20120304001240/http://www.environment.gov.au/parks/christmas/culture-history/island-history.html" target="_blank">https://web.archive.org/web/20120304001240/http://www.environment.gov.au/parks/christmas/culture-history/island-history.html</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>Torricelli, Evangelista (1715). "Introduction". Lezioni Accademiche. Florence. <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>BnF 12462161b <a href="/wiki/BNF_(identifier)" target="_blank">/wiki/BNF_(identifier)</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> </ol>