In Hindu cosmology the universe is cyclically created and destroyed in the timespan of 8.64 billion years. Deeply rooted in Hindu literature including Vedas and Puranas, it is believed time is divided into four epochs or Yuga, of which we occupy the final. In roughly 432,000 years the final Avatar Kalki will end time. Narayana destroys all this existence while creating a new existence. Time starts over.
The Rig Veda's view of the cosmos also sees one true divine principle self-projecting as the divine word, Vaak, 'birthing' the cosmos that we know, from the monistic Hiranyagarbha or Golden Womb. The universe is considered to constantly expand since creation and disappear into a thin haze after billions of years.[citation needed] An alternate view is that the universe begins to contract after reaching its maximum expansion limits until it disappears into a fraction of a millimeter.[citation needed] The creation begins anew after billions of years (Solar years) of non-existence.