Debate 2016: What Goes on in Your Brain When People Invade Your Space

Donald Trump stood very closely behind Hillary Clinton at times during the second presidential debate, held in St. Louis Sunday, prompting some to argue that he was invading her personal space. While scientists have long known that personal space exists — and that an invasion of personal space can make people feel uncomfortable — it's only recently that scientists have started to understand what's going on in the brain when someone stands too close. It turns out that it's a very basi