0 0 ▁and ▁ 4 0 0 ▁ka . ▁Fire , ▁fue led ▁with ▁wood ▁and ▁char co al , ▁allowed ▁early ▁humans ▁to ▁cook ▁their ▁food ▁to ▁increase ▁its ▁dig est ibility , ▁impro ving ▁its ▁nut ri ent ▁value ▁and ▁bro aden ing ▁the ▁number ▁of ▁food s ▁that ▁could ▁be ▁e aten . ▁ ▁Cl othing ▁and ▁shelter ▁Other ▁techn ological ▁adv ances ▁made ▁during ▁the ▁Pale ol ith ic ▁era ▁were ▁cl othing ▁and ▁shelter ; ▁the ▁ad option ▁of ▁both ▁techn ologies ▁cannot ▁be ▁dated ▁exactly , ▁but ▁they ▁were ▁a ▁key ▁to ▁human ity ' s ▁progress . ▁As ▁the ▁Pale ol ith ic ▁era ▁progress ed , ▁dwell ings ▁became ▁more ▁s oph istic ated ▁and ▁more ▁elaborate ; ▁as ▁early ▁as ▁ 3 8 0 ▁ka , ▁humans ▁were ▁construct ing ▁temporary ▁wood ▁h uts . ▁Cl othing , ▁adapted ▁from ▁the ▁fur ▁and ▁h ides ▁of ▁h unted ▁animals , ▁helped ▁human ity ▁expand ▁into ▁col der ▁regions ; ▁humans ▁began ▁to ▁migr ate ▁out ▁of ▁Africa ▁by ▁ 2 0 0 ▁ka ▁and ▁into ▁other ▁contin ents ▁such ▁as ▁E uras ia . ▁ ▁Ne ol ith ic ▁through ▁classical ▁anti qu ity ▁( 1 0 ▁ka   – ▁ 3 0 0 ▁CE ) ▁▁ ▁Human ' s ▁techn ological ▁as cent ▁began ▁in ▁earnest ▁in ▁what ▁is ▁known ▁as ▁the ▁Ne ol ith ic ▁Period ▁(" New ▁Stone ▁Age "). ▁The ▁in vention ▁of ▁pol ished ▁stone ▁axes ▁was ▁a ▁major