The End of the Universe: Dependent of Gooeyness?

Since the decade of the 1990s, astronomers discovered that the Universe is infinitely expanding in an accelerated manner (Figure 2), so everything (including atoms) will eventually "rip apart", giving the emerging Big Rip theory its curious name. This undeniable accelerated expansion requires that a little over 68% of all the ingredients that make the Universe is an exotic thing called "dark energy". We know it permeates space, and that we need it to exist in that percentage to create the observed acceleration. What it is made of, is a matter of ongoing debate and one of the pillars of modern cosmology. It could be underlying constant energy filling space or energy varying with space and time