A surprising amount of research supports the biological benefits of practicing kindness, forgiveness, compassion and gratitude. This week, we talk with an expert on cancer epidemiology. Surprisingly, though, our discussion centers on the health aspects of practicing kindness and compassion. In our polarized world, anger and hostility are rampant. But kindness is not only good for the person who receives a kind gesture. It also has a biological impact on the person providing it.