The key to predicting a man's risk of prostate cancer could lie in his index finger

Researchers compared the hands of 1,500 prostate cancer patients and 3,000 healthy men, and found that those whose index fingers were longer than their ring fingers were 33% less likely to develop the disease. That is probably because longer index fingers indicate less testosterone, a hormone that's associated with the cancer. Previous studies have found that men with naturally high testosterone levels have a heightened risk of prostate cancer.