History
At the time quantum mechanics was developed, physicists attempted to extend its range of application by formulating versions of the Schrödinger equation that were compatible with special relativity.
The first such equation was discovered by Erwin Schrödinger himself; however, he realized that this equation, now called the Klein–Gordon equation, gave incorrect results when used to calculate the energy levels of hydrogen. Schrödinger discarded his relativistic wave equation, only to realize a few months later that its non-relativistic limit (what is now called the Schrödinger equation) was still of importance.
Read more about this topic: Relativistic Wave Equations
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—David Hume (1711–1776)
“Those who weep for the happy periods which they encounter in history acknowledge what they want; not the alleviation but the silencing of misery.”
—Albert Camus (1913–1960)
“The thing that struck me forcefully was the feeling of great age about the place. Standing on that old parade ground, which is now a cricket field, I could feel the dead generations crowding me. Here was the oldest settlement of freedmen in the Western world, no doubt. Men who had thrown off the bands of slavery by their own courage and ingenuity. The courage and daring of the Maroons strike like a purple beam across the history of Jamaica.”
—Zora Neale Hurston (1891–1960)