Based on the provided reference, Homo habilis had the smallest brain capacity among the hominids discussed. Therefore, when considering brain size, the correct answer is Homo habilis.
Understanding Brain Capacity
It's important to clarify that the question “Who is the lowest brain?” is likely referring to which hominid had the smallest brain capacity, and not some concept of "lower" intelligence. Brain size, though not the sole indicator, is a crucial factor studied in anthropology to understand hominin evolution. Smaller brain capacity typically indicates an earlier stage in the evolutionary timeline.
The Case of Homo Habilis
- Brain Size: Homo habilis is known for having a brain capacity significantly smaller than later hominins.
- Significance: This smaller brain size reflects their position as an early member of the Homo genus. The reference highlights that Homo habilis had the smallest brain capacity.
- Timeline: Homo habilis existed roughly 2.4 to 1.4 million years ago, predating more advanced hominins.
- Implications: This places them at a key stage in the evolution of our species, showing the development of brain size over time.
Evolution of Brain Size
The study of hominin brain evolution involves tracking changes in skull size and capacity over millions of years.
Timeline of Human Evolution
| Hominin | Approximate Brain Capacity (cc) | Significance |
|---|---|---|
| Homo habilis | ~500-650 | Among the earliest of the Homo genus with a comparatively small brain. |
| Homo erectus | ~850-1100 | A significant increase in brain size compared to Homo habilis. |
| Homo neanderthalensis | ~1200-1750 | Large brains, often larger than modern humans, adapted to colder environments. |
| Homo sapiens | ~1300-1500 | The brain size of modern humans is among the largest. |
Summary
The reference clearly indicates that Homo habilis had the smallest brain capacity among the hominids discussed.
