Watch Escher's Impossible Perpetual Motion Waterfall Brought To Life [Video]
The water runs uphill, drops back down, spins a wheel, and runs right back up hill again. For perspective-bending artist M.C. Escher, that vision this carefully sketched lithograph. More »

LSI LINEAR TECHNOLOGY LEXMARK INTERNATIONAL LEVEL 3 COMMUNICATIONS LAWSON SOFTWARE LAND SOFTWARE LAM RESEARCH L1 IDENTITY SOLUTIONS KINGSTON TECHNOLOGY COMPANY KEY JDS UNIPHASE JDA SOFTWARE GROUP JACK HENRY and ASSOCIATES IXYS ITRON IRON MOUNTAIN INORATED IOMEGA INTUIT INTERSECTIONS INTERNATIONAL RECTIFIER