History


July 27, 2025

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.

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July 16, 2025

Hear What the World’s Oldest Song From Over 3,400 Years Sounds Like

Just as early humans created art through cave paintings and pottery, music has also served as a universal form of expression since ancient times. We’ll likely never get to hear the many songs that have been lost to history, but fortunately, there’s one remarkable piece of music from around 1,400 BCE that was preserved on clay tablets over 3,400 years ago. Known as the world’s oldest playable song, the “Hurrian Hymn No.

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