The World’s First Solar Road Explains Why We Don’t Have Solar Roads

It seems like a no-brainer: we have solar panels. We have millions of miles of road. Why not cover those roads with solar panels and fix our energy problems for good? Well, France just tried that. Turns out that solar roads aren't the miracle you'd think they are. Wattway By The Numbers The new test…

If The Earth’s Core Is So Hot, Why Doesn’t It Melt?

It's a mystery that has puzzled generations of scientists: at the very center of our planet, within a liquid outer core, is a Pluto-sized orb of solid iron. That's right, solid — even though it's nearly the same temperature as the surface of the sun. How is that possible? Swedish scientists think they know A…