The Last Three, the world’s largest rhino sculpture now installed at Astor Place in New York City, was created by artists Gillie & Marc as part of a global campaign to raise awareness about rhino conservation. These bronze sculptures depict the world's last three northern white rhinos, Sudan, Najim, and Fatu, although just this week Sudan, the male rhino aged forty-five, died from old age. Rhino horns are valued more than gold for their so-called medicinal purposes, and poaching has decimated their population. Visitors to Astor Place can have an interactive experience with the Goodbye Rhinos app, an "augmented reality platform" where users can watch rhinos roaming Astor Place, share rhino photos using the hashtag #goodbyerhinos, and leave a message. The Last Three will be at Astor Place until May 2018.