> * Is it possible for humans to get a vague impression of other humans' thoughts via this mechanism? Not via body language, but "telepathy" (it'd obviously only work over very short ranges). If it is possible, maybe it is what some people supposedly feel as "auras"

If any of it was possible, it would be easily scientifically provable by very simple experiments. The fact that it hasn't been proven while people would have very high motivations to prove it, suggests it's very probably not happening.