Happy International Day of Light! Held on May 16, it marks the anniversary of the invention of the laser by the American physicist and engineer Theodore Maiman in 1960. This pioneering creation helped revolutionize fields from communications to health care and lasers are now found in everything from printers and barcode scanners to surgical devices. Today's event also celebrates light's presence in every aspect of human existence, from art and culture to science and technology.

Today's image features 'Feelings Are Facts,' a collaborative installation by Danish-Icelandic artist Olafur Eliasson and Beijing-based architect Ma Yansong. In 2010 it filled the Great Hall of the Ullens Center for Contemporary Art in Beijing with illuminated fog. A grid of lights partitioned the haze into the primary colors of red, green, and blue, blending seamlessly at intersections to create transitional hues of cyan, magenta, and yellow. Gallery visitors relied solely on intersecting hues of colored fields to navigate the fog.