Although gravity is by far the weakest force of nature, its insidious and cumulative action serves to determine the ultimate fate not only of individual astronomical objects but of the entire cosmos. The same remorseless attraction that crushes a star operates on a much grander scale on the universe as a whole.

The Last Three Minutes: Conjectures About The Ultimate Fate Of The Universe (ed. Basic Books, 2008) - ISBN: 9780786725045