SEARCH Articles Figures Tables Clearing of protoplanetary disks Dispersal of protoplanetary disks Dust composition in protoplanetary disks Evolution of protoplanetary disk structures Molecular clouds protoplanetary disk formation Observations of thermal processing in protoplanetary disks Protoplanetary Disk Evolution Protoplanetary Disk Structure Protoplanetary disk dynamics and dust evolution Protoplanetary disk structure and evolution Some properties of protoplanetary disks Structural evolution of protoplanetary disks The observed lifetime of protoplanetary disks