Status Updates From Before the Big Bang

The reported discovery, in 2014, of gravitational radiation from the inflationary era is at least circumstantial evidence that these ideas are correct, and that our Universe is just one among many.

Guth, who had a background in particle physics and was new to cosmology, became intrigued; by the end of the year, drawing heavily on his knowledge of particle physics, he had come up with the answer to all the puzzles — the theory of inflation.

The story of the Big Bang is as well established as any story in science.