Light was important to the Incas,too,says Torrey, and in another of his favorite photos, inside the Temple of the Sun, he captures the moment when a beam of sunlight marks the changing season.

VOA: standard.2009.12.15

The technology vaporizes (but doesn't burn) garbage with arcs of electrical energy that heat matter inside their beam to 25, 000 degrees.

WSJ: Grappling With a Garbage Glut

Peruvian police said Castillo's body was found with a rope around his neck hanging from a beam inside a house on the outskirts of Cusco.

BBC: Chilean 'cult leader' Ramon Castillo found dead in Peru

Every time a fly gets inside and breaks the beam, it gets counted.

BBC: Black eggs and ripe guava lead Taiwan's tech revolution