Oh really?
"Specifically, energy (E) equals mass (m) times the square of the speed of light (c2), a prediction of Einstein's theory of special relativity.
Such tests are important because special relativity is a central principle of modern physics"
So you might be convinced that the equation wasn't known before ole Al came up with special relativity...and you'd be wrong.
You could also wonder if "how do we know these guys are right? Because they say so?" yeah, not good enough anymore.
BTW, "The work was supported by NIST and the National Science Foundation." Gotta keep the money coming in now don't we?
https://www.nist.gov/news-events/news/2005/12/einstein-was-right-again-experiments-confirm-e-mc2
Ed McQuarrie talks the REAL History of Stocks and Bond performance.
https://www.morningstar.com/funds/vanguard-wellesley-income-is-top-choice
Could be a great fund to start with starting in retirement and cash. Or use Vanguard Wellington and cash if you want to be more aggresive