Links:
Summary of mathematics: https://en.wikipedia.org/wiki/Mathema...
Earliest human counting: http://mathtimeline.weebly.com/early-...
First use of zero: https://en.wikipedia.org/wiki/0#
History http://www.livescience.com/27853-who-...
First use of negative numbers: https://www.quora.com/Who-is-the-inve...
Renaissance science: https://en.wikipedia.org/wiki/History...
History of complex numbers: http://rossroessler.tripod.com/ https://en.wikipedia.org/wiki/Mathema...
Proof that pi is irrational: https://www.quora.com/How-do-you-prov...
and https://en.wikipedia.org/wiki/Proof_t...