Just Thinkin'

The following questions I have not found answers for. So if you can help, I'd love it!

1. In order to say that Mt. Everest is the highest mountain in the world, one must assume that EVERY other mountain was also measured. But who in the heck measured every mountain, and how?

2. As I've read, Indians were not only from America, but the following countries also had their share: Canada, South Africa, and Australia. So then are they referred to as Native Candians, Native South Africans, and Native Australians as they are Native Americans? Or are they just referred to by their tribe name?

3. It is stated that just one night of the energy from the Aurora Borealis can power our country for an entire year. Why hasn't anyone tried to harness this energy and attempt to do so?

4. How do we know that what I see as blue is the same thing you see as blue? Maybe it’s my favorite color and not yours… so maybe what I call blue, in your eyes, is what I see as green? However, we were taught that certain things are blue, so regardless of what our personal perception is, we know whatever the heck we see—is blue…

5. Who appointed foul language as foul? Would the term “crap” not be the same as “sh*t” used in the same context??? Basically, does it come down to your intention behind it? If so, I’m not soo great of a person… I speak the language of “oh crap” quite often when I’m frustrated!