Researchers have used intersecting light beams to control chemical reactions in an advanced material, paving the way for future use in 3D printers that print entire layers, instead of single points, ...

An optical illusion is a visual phenomenon where our perception of an image differs from objective reality. This image is perceived as a geometric optical illusion. These optical illusions occur due ...

Two gears can mesh without having a parallel axis, which puts the gears in the same plane. Shafts that intersect or are skewed can be used to change speed or torque, depending on the need. April 18, ...