Look closely at a solar panel, and you'll see a series of thin metallic lines running across the surface. They're not there to look nice — they have a specific purpose. Those lines are called the grid ...

Forbes contributors publish independent expert analyses and insights. I write about green energy tech that will change your life. Have you ever noticed power lines sagging lower on a hot summer day?

Excel's grid feels like an endless canvas until you hit the boundaries of row 1,048,576 or column XFD. These limits aren't ...