Sofa
Theoretical Physicist. Raj is an Astro Physicist, Leonard is an Experimental Physicist.
I know of no such reference for a "natural" Big Bang Theory. Must be just another way of referring to the Big Bang Theory with a differing focus (i.e. kind of like the Hot Big Bang Theory).
In the episode, "The Speckerman Recurrence," Sheldon belittles Leonard's use of an additional marshamallow (for luck) by saying, "must be the kind of math they do at Princeton." Whether this means Leonard went to Princeton as an undergrad or a grad student is not clear.
Black-throated Magpie-Jay
The character played by Mayim, Amy Farrah Fowler, first appeared in the season finale of Season 3 of the show. When Howard and Raj realize that they have caused Amy and Sheldon to meet, their stated reaction is, "Good God, what have we done?!?" -- and the season then ends in a kind of cliffhanger.
Largely by being not related. The Big Bang theory doesn't really say anything at all about gravity.It's kind of distantly related through the "Theory of Everything", but the problem with this is that there is no Theory of Everything yet (actually, the situation is worse; there are multiple Theories of Everything, and we have no idea which is correct, or indeed if any of them are).
AtheismIf you believe in the big bang theory you probably still don't know why the big bang started in the first place. Some people credit the big bang to God if there was a big bang. _______________ There may be a flaw in the question. It seems to suggest that belief in a deity and belief in the Big Bang theory are mutually exclusive. In fact, they are independent. Any combination of belief and disbelief of the ideas can and does exist. Not all atheists/agnostics accept the Big Bang theory, and not all who are skeptical of the theory are believers in a deity. It's also odd to hear people talk about belief in a theory. Believe in usually implies trust, faith, love, reliance or something of that kind. No healthy person offers that kind of devotion to a proposed theoretical description of a natural process. Theories are either accepted or rejected. Even centuries old, widely held theories are sometimes toppled by new evidence.
Bang Bang
Some kind of a physicist (watch the Big Bang Theory for a good comparison), unless you drop out and become a physician like I did.
He wants to let you know he's here. Kind of a crude way of saying hello. It also means he likes you.
One of the beginning episodes it shows Leonard, Rajj and Howard make some kind of combustion rocket fuel substance. When Leonard adjust the formula to create a smaller scale, Sheldon points out that he didn't modify it correctly. The substance than starts to froth and in panic Leonard grabs it and takes it out into the hall where he waits for the elevator. As he steps in Sheldon comes and pulls Leonard out and presses the button for the elevator to close it's doors. When Leonard turns round and says 'I had plenty of time to...' the elevator makes a loud noise which indicates that the substance had exploded and Sheldon had saved his life.
That's the primary problem with the big bang theory - the universe has been mapped back to a couple of billionths of a second after the big bang occurred and all the data from then and beyond fits perfectly with the predictions postulated by the big bang theory itself, but there are limits to how far back you can see. However, the conflicting theories miserably fail to provide an idea as to why the universe started either - religions state that there was a god beforehand, which is infinitely more complex than an explosion, the steady state theory in addition to being pretty much disproven requires that the universe was there to start with, and Occam's razor then leads to the big bang theory. It's the simplest explanation that makes sense, but no theory in existence has a satisfactory argument as to why the universe started in the first place.