Sticholonche

A marine microbe, one of the Radiolaria, which moves by "rowing" with its spines

Sights on the pathway to sleep

Sketch of a form constant, a form of hallucination often seen when drifting off to sleep

Other dreamers may see falling tetrominoes, chess boards, or microscope slides behind their eyelids. I often see text-- apparently of a rambling, nonsensical character akin to the output of random generators, but with formatting resembling that of the books or websites I've been browsing. On a few occasions, I have even seen hypnagogic syntax trees.

Latinglish poetry

O, si vile, si ergo,
Fortibus es inero!
O nobile, demis trux.
Vadis indem? Causem dux.

Caesar adsum jam forte — Antonius sed passus sum.
Caesar aderat forte
Pompey adsum jam
Caesar sic in omnibus
Pompey sic intram

See here for explanation and more verses. See also "Oh Four Tuna".

Tea with milk

The same patterns appear on all scales.

Temari

These traditional Japanese craft items (many more images here) sometimes display symmetries resembling the Platonic polyhedra; compare this figure for instance.