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| 1978 |
| | David Attenborough writes and presents Life on Earth, a television series on evolution – the first of his many surveys of natural history | |
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| 1994 |
| | The fossilized skeleton of an Ardipithecus female, nicknamed Ardi and 4.4 million years old, is found in the Awash valley region of Ethiopia | |
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| 2003 |
| | Michael Rogers, in a team led by Sileshi Semaw, discovers the world's oldest known chipped stone tool, at Gona in Ethiopia | |
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