Tiny black dots on the nose are often sebaceous filaments, not blackheads. They’re natural oil channels that darken when oil oxidises. Squeezing irritates skin; experts advise gentle exfoliation, ...

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, ...