[jwh_Denver]

80 years my ass. I've known this for 25 years and how could I have known it unless I read it somewhere?

[Draco]

I've known this for 25 years and how could I have known it unless I read it somewhere? This was in high school physics. The particles (or mass portion of the "duality") were called photons. Our teacher had us calculate the force these photons exerted on our bodies as we stood in the sun. The "force" was infintesimally small, but it still existed. I am sure my HS understanding of electromagnetism and related subjects is rudimentary -- but I like you recall this from some time ago.