Albert Einstein’s 1915 Letter to His Son Reveals the Key To Learning
In 1915, a 36-year-old Albert Einstein was living in wartime Berlin, tirelessly chipping away at what would become one of the world’s most foundational truths: the theory of general relativity. By then, the young physicist had been working on his revolutionary theory for about eight years, and he had finally condensed it into a mere two pages.













































































