These 1950s trading cards feature great retro-future space art on the front, and… helpful safety tips on the back? (Via Retro Thing.)

Machinery is Interesting But Watch it From a Safe Distance.

Never Close Yourself Up In A Closet— Trunk or Anything Else.

Don’t Run or Play Hard with Things in Your Mouth—They Might Go Down the Wrong Way.

From Yemen, a set of stamps with visions of possible space stations.

A 2006 issue from the Democratic Republic of the Congo celebrating the conquest of space. Stamp features the X-33 VentureStar, a prototype Space Shuttle replacement; the project was cancelled in 2001.