I visited my friend who is a scientist

I visited my friend who is a scientist
He was so busy in the laboratory:

“What are you doing?” I asked
I am picking up the remaining pieces
from my last experiment

I watched, curious and steady
“They are like shards of glass,
but soft and bleeding”
Yes, it is my heart

"And what did you discover?"
That nothing in the world
is heavier
than a broken heart.