Regular bone-density scans help check for osteoporosis, a concern for seniors.
Families get smaller as standards of living improve.
Clean water, better nutrition and medical treatment mean people live longer. For example, a Thai man who was 60 in 1995 was likely to have another 18 years ahead of him. Asia will account for almost half of them in two decades. Even in the high-fertility Philippines, one in five people will be over 60. That streak of gray runs wide.