Most Strange

Boxed in was Something ;
That something was most Strange.
The Box that contained it
Weighed the same before
And after that Strange Thing
Was put inside it.
Here was a puzzle that confronted Frank.
He deeply pondered what this Thing could be.
He called his workforce to break
Open the Box. There inside it
A tiny blue dot : a Photon, which had
Some weight, so small, it registered
No weight in the Macroscopic World
That surrounded it ; it was sometimes
A Particle, sometimes a Wave ; most Strange
Indeed : a Duality. Reality was Strange.
Honestly, to most racing legal minds
This, a Conundrum beyond their Ken.
An Entity where Opposites exist as One