Let's hear it for the Stromatolites

T. dohrnii or the Stromatolite  
which of these creatures would you rather be,  
the hard-worked one, immortal,  born to die  
then reborn again thus, so endlessly?  
 
Ah, poor T. dohrnii never knows peace  
stressed or starved to death then forced to rebirth  
a never ending cycle no release,  
cursed to wander oceans and seas, of earth...
 
But Stromatolites, Earth's oldest life form,  
a strange sleeping fossil made oxygen,  
and kissed into life breathing as the norm  
these five-hundred million years, just gone.  
 
Photosynthesing air under night's cloak  
I'd be that stone, dreamless, who never woke.