In 1796, English physician Edward Jenner had a hunch. As hundreds of thousands around him succumbed to the blistering agony of smallpox, Jenner’s eye was on the rosy, unblemished complexion of Sarah Nelmes, a local milkmaid. Her skin bore none of the oozing lesions that signaled almost certain death for a third of smallpox sufferers—save for her hands, busily milking a cow named Blossom.
The locals called the unsightly affliction “cowpox.” But apart from a smattering of welts, Sarah and her fellow milkmaids were remarkably free of disease. To Jenner, this wasn’t a coincidence. Acting on little more than sparse observations, Jenner decided to extract a small sample of Sarah’s pus and inject it into the arm of a young boy named James Phipps. To everyone’s amazement—including Jenner’s—when Jenner stuck Phipps with a second needle, this time sporting a hefty dose of smallpox, Phipps remained healthy. Against all odds, the risky treatment had granted the child miraculous immunity.
Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.
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