It used to be thought that part of the human brain still had reptilian qualities—the so-called 'lizard brain'—scientists have shown that this is not the case.


Michelle Starr writing in Science Alert makes the following points:
  • Around 320 million years ago, the first four-limbed animals (tetrapods) emerged from the water onto land.
  • They split into two-parent families, birds and reptiles in one and mammals in the other.
  • Scientists sequenced RNA molecules in bearded dragons’ brains and then compared them with mouse brains.
  • There are a core set of neuron types in mammals and reptiles.
  • Most regions of the brain have a mix of ancestral and newer types of neurons within them.


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    Source Information: ScienceAlert