Discover how to build a simple device that converts light into electricity using LEDs and diodes. This step-by-step guide demonstrates assembling an LED-diode cluster, connecting it to a capacitor for ...

Hydrogen, a clean energy source, requires a highly reliable and safe storage system, which is currently lacking. Layered ...

Not all plastics are equal -- some types and colors are easier to recycle than others. For instance, black foam and black coffee lids, which are often made of polystyrene, usually end up in landfills ...