The existence of helium is evidence for the Big Bang

When people talk about evidence for the Big Bang, they're most likely to point to the Cosmic Microwave Background. But there's another major piece of evidence that the Big Bang happened, and it involves the element that makes your voice squeaky. This is the story of how helium can show that the universe had a definite… »8/13/12 2:04pm8/13/12 2:04pm