solar towers offer up to 20 times more power output than traditional flat solar panels. Two small-scale versions of three-dimensional photovoltaic arrays that were tested by MIT researchers (Photo: Allegra Boverman) .
How to Survive Field Injuries — From snake bites to sore teeth, this guide will help you tackle almost any accident. All of these injuries are quite common and a little trip to the doctor can normally sort these out! What if there were no doctor
Adafruit’s Secret Knock Activated Drawer Lock is designed to conceal traditional lock mechanisms – unlocking only when a secret pattern of knocks is detected. Essentially, a solenoid locks secures the drawer while a piezo buzzer “listens” for knocks.