Timeline of Mathematics
Strange to have non-researchers or non-mathematicians like Lewis Carrol, Ada Lovelace, or Anna Easly included while world-impacting researchers such as Shigefumi Mori, S.T. Yau, Yuri Manin, Stefan Banach, Simon Donaldson, R. Bott, M. Morse, H. Lebesgue, O. Heaviside, J. Leray, J. Tate, E. Calabi, M. Gromov, G. Perelman, F. Adams, H. Kunneth, are left out. Where are they getting their lists of people? It seems they classify anyone famous who was "technical" as a mathematician, which is the only reason why I can think of including people like Einstein, Lewis Carroll, or Ada Lovelace (none of whom made any contribution to math) as mathematicians, but leaving out those who made major advances.