Neanderthals used resin 'glue' to craft their stone tools

Archaeologists working in two Italian caves have discovered some of the earliest known examples of ancient humans using an adhesive on their stone tools—an important technological advance called "hafting."

Explained: Regression analysis

(PhysOrg.com) -- Regression analysis. It sounds like a part of Freudian psychology. In reality, a regression is a seemingly ubiquitous statistical tool appearing in legions of scientific papers, and regression analysis is ...

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