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news Biology Evidence status: Peer reviewed · Genomics study (embryos and tissues)

Octopus and squid DNA forms flexible loops linked to brain development

A Nature Communications study maps how DNA folds in squid, cuttlefish and octopus: stable domains, shifting loops, and one switch deletion that shrank brains.

What it does not show Shows how folding differs and that one loop-linked DNA switch matters for embryo development; does not show that folding changes caused cephalopod brains or intelligence to evolve

By Murad Ali Khan 11 min read
Primary sourcesResearch and official data linked in context
Evidence calibratedObservation, interpretation and speculation separated
Corrections welcomeTransparent updates and a direct reporting channel

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Explainer Biology

Can Identical Twins Have The Same DNA?

The physical similarities and shared genetic origins of identical twins have always engrossed scientists and the public. They are born from a…