We have some good ideas, so scientists have been looking to see if any of these ideas pan out. In a recent paper, astronomers report looking for one particular flavor of dark matter — low-mass axions — and they didn’t see it. That’s unfortunate, since these weird subatomic particles are a pretty good guess for what makes up dark matter. However, it doesn’t rule out axions entirely as dark matter, and in fact could spur on further tests.
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.