Chimps and humans were better at identifying white squares when they heard a high - pitched sound, and dark squares when played a low - pitched sound. (newscientist.com)
She gave her denim an edgy feel by wearing a leather biker jacket with a simple black top underneath, dark square framed sunglasses, and pale blue ankle boots. (collegefashion.net)
Another distances canvas from a stretcher to find new support, in the walls and floor, where three dark squares mark out a corner of the room. (haberarts.com)