Assertion: universe's age | /r/CapableOf | divide future history
Facets:
value: into five eras
type: OTHER
value: in their 1999 book
type: LOCATION
Source sentences:
text: Then, in their 1999 book The Five Ages of the Universe, the astrophysicists Fred Adams and Gregory Laughlin divided the past and future history of an expanding universe into five eras.