- Richard Francis Burton (Wikipedia)
Sir Richard Francis Burton KCMG FRGS (/ˈbɜːrtən/; 19 March 1821 – 20 October 1890) was a British explorer, writer, scholar, and soldier. He was famed for his travels and explorations in Asia, Africa, and the Americas, as well as his extraordinary knowledge of languages and cultures. According to one count, he spoke twenty-nine European, Asian, and African languages.
- Octahedron (Wikipedia)
In geometry, an octahedron (pl.: octahedra or octahedrons) is a polyhedron with eight faces. One special case is the regular octahedron, a Platonic solid composed of eight equilateral triangles, four of which meet at each vertex. Regular octahedra occur in nature as crystal structures. Many types of irregular octahedra also exist, including both convex and non-convex shapes.
