 | |
| Catalogno. | KNM ER 3733 |
|---|---|
| Species | Homo ergaster |
| Age | 1.63±0.15 Mya |
| Place discovered | Koobi Fora,Kenya |
| Date discovered | 1975 |
KNM ER 3733[a] is afossilizedhominid cranium of the extinct hominidHomo ergaster, alternatively referred to as AfricanHomo erectus. It was discovered in 1975 inKoobi Fora,Kenya, right next toLake Turkana, in a survey led byRichard Leakey, by a field worker called Bernard Ngeneo.[citation needed]
KNM ER 3733 is one of the oldestHomo ergaster skulls in the world. Recent research usingmagnetostratigraphy has determined the age of KNM-ER 3733 to be1.63±0.15 million years old.[1]
KNM ER 3733 is a find of a near-complete cranium. Its brain size is about 850ccm. KNM ER 3733 was compared to male fossils KNM ER 3883 and KNM WT 15000 (Turkana Boy), who were also found at the Koobi Fora site, and conjectured to be female. The features of KNM ER 3733 are less robust compared to the two male crania. It is considered an adult because of the extensive wear of its teeth, the fact that its third molars were present before the individual died, and because its cranial sutures were fully fused, which is only possible in adult specimen.[2]
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