Pencil eyeliner is probably the most commonly used type of eyeliner in North America
One type of pipe, the water pipe (also known as a "hookah"), is popular among youth and college students, in part because of the mistaken belief that it is less harmful than regular cigarettes
Strikingly, the researchers from University College London (UCL) found that the greatest increase was seen in young adults
So the hairs measure the delay between the movement as it's perceived in the hair follicle, and the slightly lagging movement in the otolith, at the other end of the hair
When viewed in its entirety, all the variously sized silk rectangles pieced together with careful, red, feather stitches create a vibrant assortment of shapes and colors