Not only it is one of the largest airports in the world but is also ranked among one of the busiest airports in the world. According to sources, Beijing Capital International Airport accounted 557,167 air craft landings and take offs, making it the busiest airport of the world in 2014.
Bone mass generally peaks around the age of 30-35, and then starts to slowly decline at around age 50 in women (60 in men) when you start to lose bone mass faster than your body can grow it back. This happens to all adults, however critical loss of bone mass (osteoporosis) is much more common in women.
There are four types of osteoporosis: primary, secondary, osteogenesis imperfecta, and idiopathic juvenile. Primary osteoporosis is the most common type of osteoporosis. It is more common in women than men. A person reaches peak bone mass (density) at about age 30. After that, the rate of bone loss slowly increases, while the rate of bone building decreases.