May 6, 2021
    
    
    
                    Gabriele Bindellini,                     Andrzej S. Wolniewicz,                     Feiko Miedema,                     Torsten M. Scheyer,                     Cristiano Dal Sasso            
            
                    
        
 
                                            
    May 11, 2021
    
    
    
                    Sebastian Stumpf,                     Steve Etches,                     Charlie J. Underwood,                     Jürgen Kriwet            
            
                    
        
 
                                            
    May 20, 2021
    
    
    
                    Thomas W. Davies,                     Zeresenay Alemseged,                     Agness Gidna,                     Jean-Jacques Hublin,                     William H. Kimbel,                     Ottmar Kullmer,                     Fred Spoor,                     Clément Zanolli,                     Matthew M. Skinner            
            
                    
        
 
                                            
    May 4, 2021
    
    
    
                    Brayden Holland,                     Phil R. Bell,                     Federico Fanti,                     Samantha M. Hamilton,                     Derek W. Larson,                     Robin Sissons,                     Corwin Sullivan,                     Matthew J. Vavrek,                     Yanyin Wang,                     Nicolás E. Campione            
            
                    
        
 
                                            
    May 3, 2021
    
    
    
                    Andrea Villa,                     Roel Montie,                     Martin Röper,                     Monika Rothgaenger,                     Oliver W.M. Rauhut            
            
                    
        
 
                                            
    May 7, 2021
    
    
    
                    Qiang Li,                     Xindong Cui,                     Plamen Stanislavov Andreev,                     Wenjin Zhao,                     Jianhua Wang,                     Lijian Peng,                     Min Zhu