Sedlec Ossuary

Chapel interior

A thermite mixture using iron(III) oxide

The Wow! signal represented as "6EQUJ5". The original printout with Ehman's handwritten exclamation is preserved by Ohio History Connection .

Smoke plumes from a few of the Kuwaiti Oil Fires on April 7, 1991, as seen from Space Shuttle Atlantis during STS-37 .

A 13th-century Czech chapel holds chandeliers, coats of arms, and garland decorations made entirely from approximately 40,000 human skeletons. A woodcarver named František Rint signed his name in the corner — in bones.