Late Equals Large? A New Look At Brain Evolution

Scientists at the Georgia Institute of Technology have successfully altered the brain of one type of Cichlid fish to resemble that of another and discovered differences in the general patterning of the brain before neurogenesis occurs. The findings, published in PNAS, challenge the popular theory known as “late equals large,” first proposed in the mid 1990s to explain the way brains evolve across species. The brain begins as a blank slate. In early development, the anterior, or front, part of the brain is specified from the posterior, or back, part. research team were able to alter the brain of an embryonic fish, read more

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