Vedas say that before the creation of the universe Lord Vishnu is sleeping in the ocean of all causes.
His bed is a giant serpent with thousands of cobra like hoods. Brahma represents the universe which we all live in, and it is this Brahma who creates life forms. Vishnu is the personification of the eternal multiverse that exists forever without any beginning or end.
By the way, in the trinity of Creator, Maintainer and Destroyer as mentioned in the vedas, Lord Vishnu is the maintainer. While Vishnu is asleep, a lotus sprouts of his navel (note that navel is symbolised as the root of creation! Brahma is the personification of our temporary physical universe that was created in the big bang.
Brahma is said to have been created from the navel (which is a single point) of Vishnu, described as a lotus blooming out of the navel, much like our big bang universe.
It is the only religion in which the time scales correspond, to those of modern scientific cosmology.
Its cycles run from our ordinary day and night to a day and night of Brahma, 8.64 billion years long.
Longer than the age of the Earth or the Sun and about half the time since the Big Bang.
Vedas also say that Lord Hanuman will be the next Brahma.
Well, thats something I have to do some research into later, the more things to think about, the more happy and occupied I am Coming back to a day of the Brahma. Vedas say that during the day Brahma is busy in creation of life and during the night all life he created is absorbed back into him!Each day of brahma is called a Kalpa, and this itself is very huge a number.