Nebra Sky Disk- 3,600 year-old complex astronomical clock is one of the most important archaeological finds of the 20th Century
Sassi di Matera, one of the oldest caves in Italy, dating back to Stone Age is still inhabited by people
Poignant portraits show female asylum patients by a Victorian psychiatrist who used the photos to analyze mental disorders
Captivating portraits show the greasy faces that represent the American railroad industry in 1942 & 1943