A 9.5-day-old mouse embryo. The front of the brain is blue and the back of the brain is red, which extends into the spinal cord. Loh Laboratory/Stanford Medicine
Joel
Kontinen
Our brain may be a hybrid of two ancient nervous systems that
were packaged together hundreds of millions of years ago. This is based on the
finding that the front and back brain regions in people and several other
species develop from two distinct cell types in embryos, instead of sharing the
same developmental origin, as previously thought..
This is
based on Darwinian speculation that has no backfiring in real science.
This is
what the evolutionists say of this incredible
fusion;
The
research suggests that evolution took two existing neural systems and pushed
them together spatially,” says Kyle Loh at Stanford University. “Having the brain as one organ
would probably be more efficient, but we rely on this primordial way to make
the brain as two separate pieces.”
Loh and his
colleagues studied early stages of mouse embryo development and found its brain
develops from two types of early progenitor cells, proliferative cells with a
limited capacity of self-renewal. One type expresses a gene called OTX2 and
turns into the neurons found in the front part of the brain, comprising the
forebrain and midbrain.
The
hindbrain coordinates fundamental life-sustaining processes, such as breathing,
sleeping, eating and the beating of the heart, .
The
researchers also studied early-stage embryos of chickens, zebrafish and acorn
worms, and found their nervous systems are similarly derived from two different
types of progenitor cells. This suggests our shared two-origin brain system
arose at least 550 million years ago.
What would,
evolution do without millions of years.
Source:
Alice Klein 2026 Our brain evolved from two primitive nervous systems that merged | New Scientist 18 September
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