[Young man resting at base of Sphinx, Delphi, Greece]

Unicyclist, Westport, Connecticut

[Boy and girl, in a classroom, reading a book, Israel]

[Young mother holding a baby, in Macedonian costume, Andartikon, Greece]

[Army officer holding a child during a baptism ceremony, Andartikon, Greece]

[Man playing violin and other folk musicians, Delphi, Greece]

Beams of Light Through Glass

Behavior of waves