Semen is typically whitish-gray with a jelly-like texture, but it can fluctuate due to different factors. For example, certain infections may make your semen look more yellow or green. Your semen is ...
Color gradient filament is fun stuff to play with. It lets you make 3D prints that slowly fade from one color to another along the Z-axis. [David Gozzard] wanted to do some printing with this effect, ...