Sean Carroll is an American cosmologist who wrote From Eternity to Here and ‘Dark Energy and the Preposterous Universe’.
Quotes by Sean Carroll in Time One
[A]t early times the vacuum energy was negligible in comparison to matter and radiation, while at late times matter and radiation are negligible. There is only a brief epoch of the universe’s history during which it would be possible to witness the transition from domination by one type of component to another. … It seems remarkable that we live during the short transitional period between these two eras.
The state of the early universe was not chosen randomly among all possible states. Everyone in the world who has thought about the problem agrees with that. What they don’t agree on is why the early universe was so special―what is the mechanism that put it in that state?
… might be a few million times as massive as the Sun – big compared to any individual star, but still small compared to the galaxy. But it will continue to grow, sweeping up whatever unfortunate stars happen to fall into it.If we wait long enough – and now we’re talking 10100 years or so – even the supermassive black holes at the centers of galaxies will evaporate.