When you start to solve a jigsaw puzzle you face many choices. Is it best to separate the puzzle pieces by shape? By color? Should the outside edges be constructed first? What are the best techniques ...

Many types of tool materials, ranging from high carbon steel to ceramics and diamonds, are used as cutting tools in today’s metalworking industry. It is important to be aware that differences do exist ...

A team of archaeologists recently applied high-tech engineering tests to stone tools, and the results suggest that even very early members of our genus, like Homo habilis, knew how to select rocks ...