Chemist Ernest Solvay and engineer Zenobe Gramme gave their names to the Solvay process and the Gramme dynamo in the 1860s. Bakelite was formed in 1907–1909 by Leo Baekeland. A major addition to science was also due to a Belgian, Georges Lemaître. He is the one who made the Big Bang theory of the start of the universe in 1927.