Isaac Asimov was a Russian-born American science-fiction writer who wrote something like 600 books including How It Happened.
Quotes by Isaac Asimov in Time One
"In the beginning," he said, "exactly fifteen point two billion years ago, there was a Big Bang and the Universe-- "I had stopped writing. "Fifteen billion years ago?" I said incredulously. "Absolutely," he said. "I'm inspired."