Why would a text on silicon-29 cost over $8,000? Debbie Kays, a lecturer in inorganic chemistry at the University of Nottingham, tackles this question, first explaining why silicon-29 is so important and then offering reasons why the...

Learn why photons, electric fields, silicon, and electrons are important when it comes to generating electricity from sunlight in solar panels. [1:15]

Sand, no matter how you use it, is pretty much the same just about anywhere you go. But why does sand almost always look the same? Much of the world's sand is made up of the same materials--tiny crystals of mineral quartz, which is made...