When the world ends, it will not 
matter who, exactly, left it early—  
the years shaved off the living  
heart, the brain cells torqued  
and plaqued by damaged genes.  
It will not matter  
that once the Cuyahoga lit up  
like a factory dying, that the water bequeathed   
to the Great Lakes by tired glaciers corroded  
ships and fish alike. What we leave behind  
is massive, minute: a layer of unusual soil 
that circles a moment,   
a diseased ring in the globe’s bark. 
That’s how we figured out   
what ate the dinosaurs: 
a strange signature, everywhere.  
No one will miss us. 
We are the comet ourselves.