#Leakytriangle #Nothing is #solid. Even nothing itself isn't
   solid - there's always stuff in it! #Tetrahedron I made for
   system-of-systems
   [vine id = "M2P0DzvXllL"]
   #Leakytriangle #Nothing is #solid. Even nothing itself isn't
   solid - there's always stuff in it! #Tetrahedron I made for
   system-of-systems