This is the world's smallest dinosaur footprint and has been officially recognized by the book of Guinness World Record in the year 2006. The Hunterian curator of fossils discovered it by chance in 2005 while examining a larger footprint at the surface of the same rock. The smaller one was found between its toes. The dinosaur that made this tiny footprint was no bigger than a blackbird. The footprint dates back to the Middle Jurassic Period, 170 million years ago. It is housed in the Hunterian Museum at the University of Glasgow, Scotland, UK.