heaven

Perhaps not surprisingly, images of heaven abound, but people cannot help but wonder what heaven looks like. Because the concept of heaven has changed a lot over time.

A recent study shows that belief in hell, even just thinking about it, reduces feelings of happiness and satisfaction in life.

Dr. Holley Alexander is a neurosurgeon at Harvard. He almost died four years ago because of an E.coli bacterial infection and left him in a coma for a week.

Unesco's Science, Education and Culture Organization has recognized China's Tian Dan as a World Cultural Heritage in 1998.