Roman engineers strengthened their mortar with a specific type of volcanic ash. “Although the presence of the high-quality stratlinglite cements does not ensure protection from concrete cracking and failure from earthquake ground shaking, it shows the very well bonded nature of the wall concrete,” said one of the scientists on the project, Marie Jackson of […]

Has someone used a pressure washer to hose down the Great Hunt Panel in Utah’s Nine Mile Canyon? Be sure to watch the video at the head of this article – it will give you a better sense of the canyon’s rock art and the impact industrial equipment has on it. The latest technology will […]