So basically you're saying, "I don't need to learn things to believe that I know them". What kind of statement is that??? Again, biting my tongue, in a difficult attempt not to flame.
Physics and History are two very different subjects. I'm not sure why you're talking about history all the sudden.
Giants roaming the earth? This is news to me, and I keep a very close ear to the scientific community.
And are you serious about the pyramids??? History has talked about that, and there are dozens of plausible theories that have no involvement with aliens whatsoever. Before the history channel was more about ratings than history, shows like Ancient Aliens that talk about aliens building the pyramids, they talked about ancient human civilizations and how they could have done it. The only difference is that aliens are more fun to hear about, so they put those shows on to boost their ratings and make more money than they did showing shows dealing with history from a scientific perspective. There is nothing to suggest that the pyramids could not have been created without help from extraterrestrial technology. Only that the process may have been easier and taken less time, using a technology that we haven't discovered yet, be it terrestrial or otherwise. But it was certainly not impossible without extra help.
I use the history channel as an example, because I assume you're not checking other more reliable sources for information on what you're talking about, due to your not needing to know about things to be an expert about them.