GENERAL KNOWLEDGE

Detailed explanation-1: -With their discovery of the cosmic microwave background in 1964, Arno Penzias and Robert Wilson placed the seal of approval on the Big Bang Theory and shared the 1978 Nobel Prize in Physics for their discovery.

Detailed explanation-2: -However, when Robert Wilson and Arno Penzias studied cosmic radiation in 1964, they discovered that microwaves with a wavelength of about 7 centimeters were stronger than expected.

Detailed explanation-3: -"Arno Penzias and Bob Wilson were trying to find the source of excess noise in their antenna, where pigeons were roosting, ‘’ he said. “They spent hours searching for and removing the pigeon dung. Still the noise remained, and was later identified with the Big Bang."