Ancient genetic change in octopuses

An ancient genetic upheaval may explain the extraordinary intelligence of octopuses. A new study has shed light on the mystery of octopus intelligence, suggesting that a rapid reorganization of their DNA, which occurred hundreds of millions of years ago, played a key role.

Cephalopod nervous system complexity

Cephalopods, which include octopuses, squids, and cuttlefish, have developed one of the most complex nervous systems in the animal kingdom. A study conducted by researchers from the University of Vienna, published in the journal Nature, has uncovered the secret behind their remarkable cognitive abilities.

Three-dimensional DNA structure

The study found that the intelligence of cephalopods is due to the three-dimensional organization of their genome. An ancient reorganization of their DNA profoundly changed the organization of genetic material inside cells, bringing certain parts of the genome together and allowing new interactions that likely influenced their intelligence.

Genetic reorganization's impact

This rearrangement would have had a major impact on the intelligence of cephalopods. The lead author of the study, Thea Rogers, explains that the genome is not just a sequence of genes but is folded into a complex three-dimensional structure. Understanding how this structure evolved is becoming increasingly important for understanding new forms of biological complexity.

Octopus neural networks and abilities

The elaborated nervous system of cephalopods, with particularly well-distributed neural networks, is even more impressive in octopuses. These creatures can solve problems and quickly change their appearance through camouflage. Austrian researchers suggest these abilities stem from a genetic event that altered the foundations of the cephalopod genome.

Sudden reorganization of DNA

Everything happened hundreds of millions of years ago. The reorganization of the DNA of octopuses took place over a relatively short period. New regions of DNA came into proximity, intertwining and influencing each other, which likely created new connections within the genome's regulatory networks.

Regulatory entanglement and evolution

The researchers refer to this process as "regulatory entanglement." This process could more broadly explain how genetic systems balance stability with evolutionary innovation. By creating new interactions between regulatory elements and genes, genomic reorganization allows changes in gene expression while preserving essential biological functions.

Consciousness and genetic effects

Octopuses are super-intelligent, but do they have consciousness? The study found that many new interactions have appeared in regions of the genome linked to the central nervous system. However, the effects of the reorganization vary depending on the species, tissue type, and developmental stage studied.

Implications for evolution

Beyond explaining the intelligence of octopuses, this study could offer important lessons on evolution. It shows that DNA is not only used to store genetic information: its three-dimensional structure can influence the interaction between genes and give rise to complex biological characteristics, such as the highly sophisticated nervous system of octopuses.