Paleontologists have known about Edestus for over 150 years. Fossils of the fish were found in the roughly 330-million-year-old shale of the United States and England, most of them with preserved teeth and parts of the jaw. Since Edestus’ discovery in the 19th century, its jaws have stymied experts looking to understand the feeding habits of this unusual fish. Edestus’ two rows of teeth aren’t arranged in a half circle, as in most modern sharks, but rather look like a pair of toothy pinking shears. Nothing like Edestus exists today, but a new analysis of a delicate fossil has solved the mystery of how this ancient marine predator consumed its prey.
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.
Have an amazing project to share? The Electronics Show and Tell with Google Hangouts On-Air is every Wednesday at 7:30pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.
