The length of an age is determined by a phenomenon called the precession of the equinoxes, which is the result of the slow backward rotation of earth around its polar axis.
(The length of an age; is determined; by a phenomenon) (a phenomenon; called; the precession of the equinoxes) (the equinoxes; is; the result of the slow backward rotation of earth around its polar axis)
The length of an age a phenomenon the equinoxes
is determined called is
by a phenomenon
the precession of the equinoxes
the result of the slow backward rotation of earth around its polar axis