On November 11, 1675, German mathematician and polymath Gottfried Wilhelm Leibniz demonstrates integral calculus for the first time to find the area under the graph of y = ƒ(x).
On March 21, 1768, French mathematician and physicist Jean Baptiste Joseph Baron de Fourier was born. He is probably best known for his work in thermodynamics, where he introduced the concept of the Fourier Analysis, named in honor after him. There, he claimed that every mathematical function of a variable can be expanded to a sum of sines of multiples of that variable. What people most likely don't know is that Fourier also was the first to describe the greenhouse effect, which is responsible also for global warming.
L. Bahl, R. Bakis, P. Cohen, A. Cole, F. Jelinek, B. Lewis, and R. Mercer. Proceedings of the 1980 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), 5, page 872-875. Denver, CO, USA, (April 1980)
P. Massey, J. Clark, and S. Stepney. GECCO 2005: Proceedings of the 2005 conference on
Genetic and evolutionary computation, 2, page 1657--1663. Washington DC, USA, ACM Press, (25-29 June 2005)