M: Long ago, our primitive ancestors who ventured farthest from their caves to find better food or overcame their fear of fire gained a significant advantage over their meeker kin. Today, living dangerously engages our intellect, advances society, and even makes us happier. A 2005 German study found that people who take above-average risks have a higher degree of life satisfaction. A study by Colson University revealed that among North American business managers, those who take greater risks are more successful. So the more risk you're willing to take, the more reward you'll reap and the better you'll feel. It's important not to go too crazy, though -- know your limits, and calculate the odds.