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 ...

Radiation within the visible spectrum can appear black if it is low in power – more specifically, lower in power than its ...

“Throughout our lives, we make associations which mean things. Cake is associated with birthdays. Ice cream is associated with parties and good times, so everything is associative learning ...

People seen in front of warm walls are thought to be friendlier; use these colors in rooms where people will spend time socializing. Make a good impression. We may link blue to trustworthiness ...