Cell TheoryProponents: Matthias Schleiden, Theodor Schwann, at Rudolf VirchowYear Introduced: 1838–1855Law of Inertia (First Law of Motion)Proponent: Galileo Galilei at pinalawak ni Isaac NewtonYear Introduced: Galileo (1600s), Newton (1687)Theory of EvolutionProponent: Charles DarwinYear Introduced: 1859 (nang mailathala ang On the Origin of Species)Atomic TheoryProponent: John DaltonYear Introduced: 1803