Machines have for centuries worked for humankind, but can they also think for us? It seems they can, and this amazing but potentially frightening development is called artificial (or machine) intelligence (AI). Unlike natural human or animal intelligence, AI devices survey their surroundings and take aim at a target, imitating human learning, problem solving and carrying out other types of cognitive functions.

A Stanford University-led study of three 13,000-year-old stone mortars discovered near a graveyard site called the Raqefet Cave, in the Carmel Mountains near Haifa, identified ancient beer residue that is believed to be between 11,700 to 13,700 years old. The mortars are attributed to Natufians, a semi-nomadic group of people who lived in the Levant between the Paleolithic and Neolithic periods.