Georges LemaƮtre, (The Lesser Known) Father of the Big Bang!
When anyone talks about The Big Bang Cosmology or The Expanding Universe, the first name that comes to one's mind is Edwin Hubble. He is called the Father of the Big Bang.
But the lesser known fact is that the idea of the expanding universe was first proposed by Georges Lemaitre in 1927.
Here is complete information about Georges Lemaitre and the idea of the Expanding Universe on the American Museu m of Natural History website.