A  Science and Technology Odyssey In Cyberspace-Time 
20000 BC to 1800 AD
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Title Page

20000BC-301BC

300BC-1499AD

1500 - 1699

1700 - 1800

Back to Timeline 1500 thru 1699 

Negative Numbers
1545

"Geronimo Cardano (1501-1576) writes Ars magna and uses solutions to polynomials which lead to square roots of negative quantities, but calls them "sophistic" and concludes that they it is "as subtle as it is useless." (This work is often taken to mark the beginning of the modern period of mathematics.)" Quote from site

Actually the concept of negative numbers as a solution of quadratic equations were considered as early as 665 AD. Click site below to see entire timeline.

Marie Curie's Search for Radium (Science...

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