“French fries” might not be on the menu if not for ancient farmers, and not because we can now grow plenty of potatoes, but because it would be harder to enunciate the f sounds needed to order them. The ability to make labiodental sounds—which are sounds that require you to put your lower lip on your upper teeth, such as f and v sounds—may not have fully developed until agriculture introduced softer foods to the human diet, changing our jaws, according to an intriguing and controversial study published today in Science.
Orthodontists know that overbite, and the human jaw’s horizontal overlap called overjet, are common among people all over the world. But the study’s authors assert that such jaw structures were rarer in the Paleolithic Period, when hunter-gatherer’s rough diets demanded more force from teeth that met edge to edge. Agriculture softened our ancestors’ diets with processed gruels, stews and yogurts, and this fare led to gradually shrinking lower jaws to produce today’s overcrowded mouths. This diet-driven evolution of the human bite over the last 10,000 years might have shaped some of the sounds we use to communicate today.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
Have an amazing project to share? The Electronics Show and Tell with Google Hangouts On-Air is every Wednesday at 7:30pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.
