Do you want to know the future, how long you're going to live? How, and even when you'll die? For many of us, that's a pretty scary thought. But it can be done. There's a simple, do-it-yourself DNA test that can tell if you're likely to suffer from cancer, heart attack, or even Alzheimer's disease - a glimpse of the killer within, knowledge that could help save your life. And now, more and more Australians are taking the test to ease the uncertainty, to get a hint of what's in store.