I relearned today
about Earth's seven layers. 
I knew about them in 6th grade
but only in hazy, nondescript detail. 

Scientist's knowledge about the Earth
is only based on hypotheses. 

We don't actually know for sure
what we are standing on every day. 

All these layers of uncertainty
reminded me of myself. 

Do I have a mantle? 
What's really inside of me? 
Could someone tell how solid I am just by holding me? 

I cry when something inside me shifts. 
Am I all that measurably different from earthquakes? 

Are we defined by our core's composition,
or just by the way we feel when we are proven to exist?