Solar cells are an increasingly important source of renewable energy, but there’s still room for improvement. Stanford engineers have now developed a pyramid-shaped lens that can focus sunlight from ...

Austin architect Peter Pfeiffer had a problem. His clients like the idea of tapping Mother Nature's sun and wind to generate their own electricity. It's a romantic notion that is quickly dashed by ...

When I was in elementary school, my teacher taught our class about the food pyramid and the importance of a balanced, healthy diet. If we were going to grow up to be big and strong, we needed to eat ...