Most of the flecks in the foreground of the GIF are actually particles floating far away from Comet 67P—and not on the surface of the icy world. Rosetta captured the images while circling some ...

Blue flecks of lapis lazuli in the tartar of a 10th-century nun. She likely was an accomplished painter and manuscript illuminator, who used her (unbrushed) teeth to shape her paintbrush.

The Invisible Blue-Jean Particles in the Original Star-Spangled Banner. The American flag at the Smithsonian has collected blue cotton fibers over the years, but not as many as popular legend says.