Excavations
Leakey served her apprenticeship in archaeology under Dorothy Liddell at Hembury in Devon, England, 1930-1934, for whom she also did illustrations. In 1934 she was part of a dig at Swanscombe where she discovered the largest elephant tooth known up to that time in Britain, but needed assistance to identify it.
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.
The Leakeys unearthed a Proconsul africanus skull on Rusinga Island, in October 1948.
After Mary's husband died, she continued her work at Olduvai and Laetoli. It was here, at the Laetoli site, that she discovered Hominin fossils that were more than 3.75 million-years-old. She also discovered fifteen new species of other animals and one new genus.
From 1976 to 1981 Leakey and her staff worked to uncover the Laetoli hominid footprint trail which was left in volcanic ashes some 3.6 million years ago. The years that followed this discovery were filled with research at Olduvai and Laetoli, the follow-up work to discoveries and preparing publications.
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