by Elio — If there is a limit to what uni­cel­lu­lar or­gan­isms can do, you can't prove it by me. As Michael Hansell writes in an ar­ti­cle en­ti­tled Houses Made by Pro­tists, some sin­gle cells can make ex­ceed­ingly in­tri­cate struc­tures. Us­ing a Q&A for­mat, Hansell, who bears the in­ter­est­ing ti­tle of…