"Explore the Hand of Genius," now at the High Museum of Art in Atlanta Georgia.
If you cannot be there in person, you can access their interesting website for an introductory video, highlights from the exhibition, as well as time-lapse video of the installation the Sforza Horse Monument outside the Museum.
The recent cleaning of Andrea del Verrocchio's The Beheading of St. John the Baptist (1477–1483) relief has enabled a detailed examination of its individual components.
A guest curator, recently proposed that two of the figures (marked with arrows) were created by Leonardo da Vinci and not Verrocchio.
The figures in the relief were created separately and attached to the silver background, making it possible for more than one artist to contribute to the composition.