Was the BB an explosion?<quoted text>you seem very qualified at making a fool of yourself talking about things you do not understand at all.
tell us about the big bang explosion one more time...snicker...
"To any forms of life arising afterward, such as us, the inflation would look like a giant explosion from which the universe originated
"Such a scenario isnât as crazy as it sounds. Our universe is expanding and becoming increasingly dilute, and the high-entropy future will be one in which space is essentially empty. But quantum mechanics assures us that empty space is not a quiet, boring place; itâs alive and bubbling with quantum fluctuationsâephemeral, virtual particles flitting in and out of existence. According to a theory known as the âinflationary universe scenario,â all we need is for a tiny patch of space to be filled with a very high density of dark energyâenergy that is inherent in the fabric of space itself. That dark energy will fuel a spontaneous, super-accelerated expansion, stretching the infinitesimal patch to universal proportions.
Empty space, in which omnipresent quantum fields are jiggling back and forth, is a natural, high-entropy state for the universe. Eventually (and weâre talking about a really, really big eventually) the fluctuations will conspire in just the right way to fill a tiny patch of space with dark energy, setting off the ultra-fast expansion. To any forms of life arising afterward, such as us, the inflation would look like a giant explosion from which the universe originated, and the quiescent backgroundâthe other universesâwould be completely unobservable. Such an occurrence would look exactly like the Big Bang and the universe we experience.
The most appealing aspect of this idea, Chen and I have argued, is that over the vast scale of the entire universe, time is actually symmetric and the laws truly donât care about which direction it is moving. In our patch of the cosmos, time just so happens to be moving forward because of its initial low entropy, but there are others where this is not the case. The far past and the far future are filled with these other baby universes, and they would each think that the other had its arrow of time backwards. Timeâs arrow isnât a basic aspect of the universe as a whole, just a hallmark of the little bit we see. Over a long enough period of time, a baby universe such as ours would have been birthed into existence naturally. Our observable universe and its hundred billion galaxies is just one of those things that happens every once in a while, and its arrow of time is just a quirk of chance due to its beginnings amid a sea of universes.
Such a scenario is obviously speculative, but it fits in well with modern ideas of a multiverse with different regions of possibly distinct physical conditions. Admittedly, it would be hard to gather experimental evidence for or against this idea. But science doesnât only need evidence, it also needs to make sense, to tell a consistent story. We canât turn eggs into omelets, even though the laws of physics seem to be perfectly reversible, and this brute fact demands an explanation. Itâs intriguing to imagine that the search for an answer would lead us to the literal ends of the universe."