Robert Hofstadter was born today ninety-eight years ago. He pioneered work in the structures of nucleons and his work helped create an understanding of the order of subatomic particles.
3.141592653589793238462… = 3.2!?!?!?! The Indiana Legislature passed a law mandating that the circumference of a circle equal 3.2 times its diameter. It argued that “the ratio of the diameter and circumference [pi] is as five-fourths to four.” It made it through the Indiana House but not through the Senate…
Elizabeth Blackwell, the first woman to earn an M.D. in the United States, was born on February 3rd, 1821. Incidentally, when she was accepted to medical school, reviewers at the Geneva Medical School (now Hobart and William Smith College) initially thought her application was a spoof. Nonetheless she graduated in 1849.
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.