Great Pyramid partially made with cement
It’s not every day that you find out something new about the Great Pyramid — it’s been sitting there for around 4 500 years and lots of people have studied it. This news is from 5 years ago, and I hadn’t heard about it. A Materials Science and Engineering professor has discovered that some of the blocks that make up the Great Pyramid were not carried there whole but created there out of limestone, clay, lime, and water.
The Surprising Truth About How the Great Pyramids Were Built