This is one of the reasons why some males birds have exotic plumes, why elk carry hefty antlers (a sign of a healthy immune system), and why male fiddler crabs have such large claws.
At present, the disease chart and death chart of Chinese inhabitant have obviously changed. Chronic disease becomes the top and brings about many hygienic problems of healthy and lives.
Too many workplace policies effectively prohibit employees from developing a healthy work-life balance by barring them from taking time off, even when they need it most.
Women's magazines ran headlines like "Stress causes illness!" If you want to stay physically and mentally healthy, the articles said, avoid stressful events.
People physically fit enough to survive over 100 years ultimately give into diseases such as Alzheimer's which affects the mind and cognitive function.