- When Martin Luther King Jr. was born in Atlanta, Georgia on January 15, 1929, his birth certificate listed his name as “Michael King Jr.” – after his father Michael King Senior. How and when did Michael King become Martin Luther King?
- Regular octahedron (Wikipedia)
A regular octahedron is an octahedron that is a regular polyhedron. All the faces of a regular octahedron are equilateral triangles of the same size, and exactly four triangles meet at each vertex. A regular octahedron is convex, meaning that for any two points within it, the line segment connecting them lies entirely within it.