Engineers and materials scientists are still studying Roman structures today, and they say the secret is the marriage of ingenious design with an innovative recipe for concrete, a supremely durable and adaptable material that is still used the world over. While the Romans didn"t invent concrete, they certainly raised the bar for building with it.

อ่านต่อได้ที่ : โรงเรียนวัดหน้าเขา

สาระน่ารู้ : สตรีมีครรภ์