How has life on earth changed?
The basic mechanisms and requirements have not changed - only the forms.
The chemical and biological functions that produce "life" as we know it on earth have not changed since their appearance.
The many forms and diversity of life continue to change in some respects, within the ranges of their specific "sub-Kingdoms" in taxonomy. The rates of change, types of change, or whether observed "changes" are simply previously unknown versions are not predictable.