A US-born two-year-old female Chihuahua named Pearl is now officially the world's shortest-living dog, Guinness World Records has announced. Pearl measures 9.14 cm (3.59 inch) in height, meaning she's shorter than a popsicle stick and a TV remote. "In length, Pearl measures 12.7 cm (5.0 inch) - around the same size as a dollar bill," it added.