Eventually, the working of metals led to the invention of alloys corresponding to bronze and brass . The first makes use of of iron alloys corresponding to metal dates to round 1800 BCE. Human’s technological ascent began in earnest in what is called the Neolithic Period (“New Stone Age”). The invention of polished stone axes was a major advance that allowed forest clearance on a big scale to create farms. This use of polished stone axes elevated greatly within the Neolithic, however were initially used within the preceding Mesolithic in some areas corresponding to Ireland.
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