How History Speaks on Instagram: "What looks like a simple marble toy is actually a 700-year-old mathematical idea in motion. This device demonstrates the Tusi Couple, where two perfectly synchronized circular motions combine to create a straight-line path. Invented by 13th-century Persian scholar Nasir al-Din al-Tusi, this principle was once used to explain planetary motion in astronomy. The steel balls only appear to move straight, but their path is the result of pure geometry cancelling curve

Bach furniture on Instagram: "This is a modern, compact bedside table designed for both style and everyday convenience. It features a clean geometric design with a smooth matte finish, making it a perfect fit for contemporary bedrooms. The table includes a spacious pull-out drawer for storing essentials like phones, chargers, books, or personal items, plus an open shelf underneath for quick-access storage. Its solid, sturdy build ensures durability, while the minimalist look blends easily with d