For animals, they are often designated as “arc of flight” — that invisible periphery where violation results in immediate retreat or thoughtless stampede. For humans, it is identified as one’s “space”, or “privacy bubble”, and while self-control and societal norms have curtailed and somewhat dulled the thousands of years of evolutionary refinements to reactive instincts, the palpable discomfort manifested, the shifting unease of taboos violated, and for some, an onset of panic and heightened anxiety are the resulting characteristics of Darwinian antecedents. […]