There are 950 species of sea urchins living on seabeds, making them one of the most widespread and common echinoderms in our oceans. They’re often called the “porcupines of the sea” because of their long spines that deter hungry predators. However, the marine animals are also prone to covering themselves with stones, shells, rocks—and even tiny hats.
Biologist Morgan Kester recently shared this discovery on social media. She writes, “I was today years old when I learned that sea urchins naturally use shells as hats for camouflage, so some aquarists had the genius idea to make them tiny hats.” She posted photos of the dapper-looking sea urchins “wearing” 3D-printed cowboy hats, top hats, and fedoras. The sea urchins not only look stylish, but the hats also help to keep them safe. Although the exact reason for covering their “heads” is unknown, it’s been theorized that the extra weight helps prevent the sea creatures from being washed away during storms. The extra coverage is also thought to protect sea urchins from predators and UV rays.
Eink, E-paper, Think Ink – Collin shares six segments pondering the unusual low-power display technology that somehow still seems a bit sci-fi – http://adafruit.com/thinkink
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.