Sign up for CNN’s Wonder Theory newsletter to dive into captivating stories of amazing discoveries and scientific breakthroughs. Uncover the hidden feature found beneath a medieval castle in Milan, possibly created by Leonardo da Vinci, the genius known for his art, science, and military expertise. Researchers used noninvasive methods to reveal a secret underground passageway designed for soldiers. Surprisingly, a second tunnel was discovered, hinting at a complex defensive system designed to defend the castle’s perimeter. This finding emphasizes the importance of preserving our architectural heritage and recognizing history’s impact on our modern cities. Join in on the quest to unveil the hidden secrets of the past.
https://www.cnn.com/2025/03/01/science/leonardo-da-vinci-sforza-castle-tunnels/index.html