Have you ever wondered why being surrounded by nature feels so good? Research has long found spending time outdoors in gardens, forests and other nature is linked to strong mental and physical health, and now a researcher from the University of Illinois has found out why that is. In our daily lives, we are constantly fixated on problems and dealing with stress which is a well-known immune system killer. In nature, we get away from all that. Instead of wasting energy on obligations like work, the body can invest more energy and resources towards the immune system as a result of the content, safe feeling we get from being in nature.