> smallest organism ever observed ...today. Life was simpler back in the day. For example, RNA world. This more primitive life might not survive more sophistic

> smallest organism ever observed ...today. Life was simpler back in the day. For example, RNA world. This more primitive life might not survive more sophisticated life. (thougn it's also possible it's still around, but we haven't noticed it; or haven't recognized it as life). IDK if small enough, but viruses are simpler. If it can reproduce - e.g. a short strand of DNA or RNA or even something simpler - it could form the beginnings of "life" as a precursor, even though it wouldn't meet our current definitions of "alive". There's theories of fatty spheres being the first "cells" (really, "kinda sorta cells").