Why do we pull faces when we concentrate?
Do you stick your tongue out or scowl when you concentrate? Maybe, like one of our listeners, you screw up your face when you\u2019re playing music. Do these facial expressions actually help with the task in hand? And could they hold clues to humans\u2019 evolutionary past?\n \t\nIn this edition of CrowdScience we tackle the science of face-pulling, along with several more burning science questions sent in from listeners around the world. We explore why it\u2019s almost impossible to talk without moving your hands; and why bilingual people often switch to the first language they learned when they\u2019re counting, even if they speak another language the rest of the time.
Presented by Anand Jagatia and Marnie Chesterton\nProduced by Cathy Edwards
(Photo: A boy sits at a table, looking down in concentration as he draws in a note pad. Credit: Getty Images)