Het universum moet juist niets.
We weten nog niet genoeg om daarover met enige zekerheid te spreken. Er zijn verschillende quantum gravitation theorien in omloop die zich daar wel over uitspreken maar die tak zal nog wel enkele decennia nodig hebben om uit te klaren wat het meest waarschijnlijke scenario is. En zelfs dan nog, er zullen altijd grenzen zijn aan onze kennis. Gotta learn to live with uncertainty. ^^
Een pac-man scenario had ik wel geinig gevonden, dat je als je maar lang genoeg in dezelfde richting reist, je uiteindelijk terug bij je vertrekpunt aankomt maar dat lijkt niet meer mogelijk nu men denkt dat het universum plat is.
Een eindeloze zee van big bangs heeft ook wel iets. Hypotheses genoeg, take your pick or mix and match
Quilted
The quilted multiverse works only in an infinite universe. With an infinite amount of space, every possible event will occur an infinite number of times. However, the speed of light prevents us from being aware of these other identical areas.
Inflationary
The inflationary multiverse is composed of various pockets where inflation fields collapse and form new universes.
Brane
The brane multiverse follows from M-theory and states that each universe is a 3-dimensional brane that exists with many others. Particles are bound to their respective branes except for gravity.
Cyclic
The cyclic multiverse has multiple branes (each a universe) that collided, causing Big Bangs. The universes bounce back and pass through time, until they are pulled back together and again collide, destroying the old contents and creating them anew.
Landscape
The landscape multiverse relies on string theory's Calabi–Yau shapes. Quantum fluctuations drop the shapes to a lower energy level, creating a pocket with a different set of laws from the surrounding space.
Quantum
The quantum multiverse creates a new universe when a diversion in events occurs, as in the many-worlds interpretation of quantum mechanics.
Holographic
The holographic multiverse is derived from the theory that the surface area of a space can simulate the volume of the region.
Simulated
The simulated multiverse exists on complex computer systems that simulate entire universes.
Ultimate
The ultimate multiverse contains every mathematically possible universe under different laws of physics.