Al Biruni’s Genius Method 🌍 How Earth’s Size Was Measured 1000 Years Ag...

"No satellites. No supercomputers. Just a mountain, a horizon, and Al-Biruni’s mind! In the 11th century, he cracked Earth’s size using pure geometry—centuries ahead of his time. Genius isn’t modern, it’s timeless. Please like, share, and subscribe for more mind-blowing facts from history!"