In women's artistic gymnastics, beam is the third event in the Olympic order. This apparatus is 4 inches wide, 16 ft long and 4.10 ft high. Since the 80s, beams have been covered in leather or suede ...

Cambodian master classical dancer Penh Yom walks between her teenage students, painstakingly adjusting a bent-back finger here and the tilt of a head there, as she passes on a centuries-old art form.