by Merry — The en­dosym­bionts of in­sects pro­vide an un­end­ing pa­rade of nov­elty. They seem to knock on our door, one af­ter the other, each pur­vey­ing some new twist of mi­cro­bial evo­lu­tion. They break the rules, re­model the ge­netic code, and blur the line be­tween or­gan­ism and or­ganelle. Here is one more...