Are there internet historians?

Well, it depends on what you're doing. You see, it's better to be in your computer if you have a virus, so you can know what your doing or how your computer works. But if you love being on the...

Your mum but then she took an arrow to the knee so it was chuck norris

"a" is for when a word starts with a consenant (non-vowel) sound, and "an" is for when a word starts with a vowel sound. We pronounce the H in historian so you would use "a".

The first one has a capital i.

Both are correct. In words where the stress is not on the first syllable, an initial h may be silent before the articles an and the.