by Elio — From bac­te­ria on up, all the way to the cells of our bo­dies, most cells di­vide by bi­na­ry fis­sion. That is, the pro­cess ini­tiat­es at mid­cell, usu­al­ly by con­strict­ion, and pro­ceeds un­til the two re­sult­ant daugh­ter cells be­come se­pa­rat­ed. Most of­ten, these two sis­ter cells are iden­ti­cal in size and shape. Bor­ing. En­ter Ba­cil­lus sub­tilis...