Why do tribal genealogies matter in modern-day Saudi Arabia? What compels the strivers and climbers of the new Saudi Arabia to want to prove their authentic des

"Teaches readers about layers and types of of soil, dirt, and earth underground"--

Down where worms wriggle and microbes squirm, there's a whole world waiting to be discovered... Under Your Feet delves beneath the Earth's surface and explores

Sand, clay and rock have to be excavated for a variety of purposes, such as dredging, trenching, mining (including deep sea mining), drilling, tunnel boring and

Down where worms wriggle and microbes squirm, there's a whole world waiting to be discovered...Under Your Feet delves beneath the Earth's surface and explores t