Lynn Margulis first proposed the theory of endosymbiosis.
The basic theory was first discussed and proposed by Bernoulli.
He proposed the wave-particle duality for the electrons.
1905
Louis de Broglie proposed the matter wave theory and the corresponding equation then Lester Germer and Clinton Davisson confirmed it to be true, by experimentation, for electrons.
Alfred Wegener first proposed the theory of continental drift in 1912.
Might be helpful if we new the theory....
Alfred Wegener
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He first proposed this theory in 1943 in his paper, "A Theory of Human Motivation"
Christiaan Huygens and Isaac Newton were both responsible for the knowledge we have today on the motion of light. Huygens proposed his wave theory for light's motion and Newton proposed the particle theory in the 17th century. It is accepted today that light moves in both wave form and particle form at once.