Fine-tuning evidence has raised compelling questions about the universe's beginning, evolution and eventual end. Image Courtesy NASA/WMAP Science Team. Every science student can recall having to memorize certain important numbers during their school years: the gravitational constant, the speed of light and Avogadro’s number, to name a few. In recent years, scientists have found extremely precise values for these fundamental constants. But what if the value of these constants were ever so slightly different? In some cases, life would not even exist.
brought to you by the American Physical Society