You Don't know xxxx

Humans can only see a very small part of the electromagnetic spectrum.It's not even half a percent of the spectrum. This same idea applies to everything we experience and know such as smell, taste, hearing, our whole sence of common sence, ect. There is so much knowledge in the universe that humans couldn't even fathom. This means facts become theories, and theories are still theories but they may never be proven. As much as man kind knows now it doesn't even matter or compare to the unknown of the rest of the universe.