What do things look like when they move near the speed of light? Relativity visualized here: Link

Portraits of child labor in the United States between 1908 and 1912, as documented by Lewis Hine. This one above is from Newberry, South Carolina. Link

From the website:

The overseer said apologetically, "She just happened in." She was working steadily. The mills seem full of youngsters who "just happened in" or "are helping sister."

This is the Newspaper Rock or Tse’ Hane (Rock that Tells a Story) records 2000 years of human activity near Monticello, Utah. Basically, passer-by people of the Fremont, Anasazi, Navajo, and other tribes add their own graffitti to the rock.

More amazing pictures at The Gigapixl Project’s Portrait of America.

Mel Kadel’s illustrations are pretty cool & funny. Check it out: Link