The ancestors of modern humans have walked upright since around 4 million years ago, when members of the genus Australopithecus first started spending more time on the ground than in treetop habitats. Evolving to be bipedal changed a number of things about the human skeletal structure. Our pelvis is shorter and wider than that of other living primates. This is because we move by exerting force mostly through muscles in our butts and legs rather than along our backs and shoulders, as a knuckle-walking chimp would. Our lower femurs (the big bone in your thigh) develop a specific shape, called the bicondylar angle, as we learn to walk.
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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, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, 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.
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