The years 1935 to 1959, spent at Olduvai Gorge in the Serengeti plains of Northern Tanzania, yielded many stone tools from primitive stone-chopping instruments to multi-purpose hand axes. These finds came from Stone Age cultures dated as far back as 100,000 to two million years ago.
ð ə WORD_BOUNDARY j ɪ ɹ z WORD_BOUNDARY n aɪ n t iː n h ʌ n d ɹ ɪ d WORD_BOUNDARY θ ɜː t i WORD_BOUNDARY f aɪ v WORD_BOUNDARY t ə WORD_BOUNDARY n aɪ n t iː n h ʌ n d ɹ ɪ d WORD_BOUNDARY f ɪ f t i WORD_BOUNDARY n aɪ n WORD_BOUNDARY s p ɛ n t WORD_BOUNDARY æ t WORD_BOUNDARY oʊ l d uː v aɪ WORD_BOUNDARY ɡ ɔ ɹ d̠ʒ WORD_BOUNDARY ɪ n ð ə WORD_BOUNDARY s ɛ ɹ ə ŋ ɡ ɛ t i WORD_BOUNDARY p l eɪ n z WORD_BOUNDARY ʌ v WORD_BOUNDARY n ɔ ɹ ð ə ɹ n WORD_BOUNDARY t æ n z ʌ n iə WORD_BOUNDARY j iː l d ɪ d WORD_BOUNDARY m ɛ n i WORD_BOUNDARY s t oʊ n WORD_BOUNDARY t uː l z WORD_BOUNDARY f ɹ ʌ m WORD_BOUNDARY p ɹ ɪ m ɪ t ɪ v WORD_BOUNDARY s t oʊ n t̠ʃ ɑ p ɪ ŋ WORD_BOUNDARY ɪ n s t ɹ ə m ə n t s WORD_BOUNDARY t ə WORD_BOUNDARY m ʌ l t aɪ p ɜː p ə s WORD_BOUNDARY h æ n d WORD_BOUNDARY æ k s ɪ z WORD_BOUNDARY ð iː z WORD_BOUNDARY f aɪ n d z WORD_BOUNDARY k eɪ m WORD_BOUNDARY f ɹ ʌ m WORD_BOUNDARY s t oʊ n WORD_BOUNDARY eɪ d̠ʒ WORD_BOUNDARY k ʌ l t̠ʃ ə ɹ z WORD_BOUNDARY d eɪ t ɪ d WORD_BOUNDARY æ z WORD_BOUNDARY f ɑ ɹ WORD_BOUNDARY b æ k WORD_BOUNDARY æ z WORD_BOUNDARY w ʌ n h ʌ n d ɹ ɪ d WORD_BOUNDARY z iə ɹ oʊ z iə ɹ oʊ WORD_BOUNDARY z iə ɹ oʊ WORD_BOUNDARY t ə WORD_BOUNDARY t uː WORD_BOUNDARY m ɪ l iə n WORD_BOUNDARY j ɪ ɹ z WORD_BOUNDARY ʌ ɡ oʊ WORD_BOUNDARY