A: You don’t have to drive halfway to Harrisburg to run across the black-and-white lane lines, Harold. PennDOT chose to use them for the 12-mile section of I-78 east of the Hellertown ...

Called the McCollough effect, it involves staring at images of vertical and horizontal lines, and it can make you see black and white as green and red for up to three and a half months.

According to Burke, the new black-and-white lines are called contrast markings, which are designed to improve line visibility in different weather conditions. The markings consist of alternating ...

The Nazca Lines have puzzled the world since Peruvian ... as well as cultures in Chile's Atacama Desert, in stunning black-and-white photographs. Ranney has been photographing archeological ...

Especially when it comes to QR codes, which rather than using vertical lines consist of constellations of tiny black and white squares in a pattern that is readable by digital smartphone cameras.