In the United States, hemp has only recently been deregulated for any kind of use—its cultivation blocked in 1937 by a public ...

More than 2,300,000 limestone and granite blocks were pushed, pulled, and dragged into place on the Great Pyramid. The average weight of a block is about 2.3 metric tons (2.5 tons). How much is that?

The Office of Personnel Management handles retirement paperwork for the entire federal government out of an old limestone mine in Pennsylvania. The process is set to be overhauled by Elon Musk’s ...

Surface water and rain do not flow far on exposed limestone as they rapidly infiltrate into the rock and soil. Where a joint or intersection of joints has been greatly weathered or dissolved ...

The discovery of bauxite shall directly support India’s aluminium production with the necessary raw material supply chain.