Some people subconsciously display the telltale signs of deception that make their lies relatively easy to spot -- but other liars are much more elusive. Neuroscience has been looking into what happens in the brain to explain this difference.

Twitter is awash with trolls, spammers and misanthropes, all keen to ruin your day with a mean-spirited message or even a threat that can cause you genuine fear. It seems all too easy to set up an account and cause trouble anonymously, but an emerging field of research is making it easier to track perpetrators by looking at the way they use language when they chat.

A few weeks ago, after I said goodbye to a friend who was moving across the country, I texted her an emoji of a crying face. She replied with an image of chick with its arms outstretched. This exchange might have been heartfelt. It could have been ironic.

Think you haven't got the aptitude to learn a foreign language? New research led by Northwestern University neuroscientists suggests that the problem, quite literally, could be in your head.

Monday, April 8, marked the launch of Code Switch, our new blog covering race, ethnicity and culture. To commemorate the blog's launch, all week we solicited stories about code-switching - the practice of shifting the languages you use or the way you express yourself in your conversations.