Read full article: 21-year-old Florida dog recognized as oldest in the world A 21-year-old chihuahua in Florida has made some history, according to the Guinness Book of World Records. 5.6-pound ...

You can’t even see the world’s smallest medical robot, but your body’s cells know it’s there The robot, a mere 120 nanometers in size, just entered the Guinness Book of World Records.

By Christmas that year it became Britain's number one bestseller and has since produced a book each year under its new title, Guinness World Records.