Petri dishes have hosted all sorts of experiments, like
cultivating mold or creating amoeba breeding grounds. But
now, truly futuristic events are happening in these circular
glass plates -- most notably, growing a brain.

That's right, scientists are now raising brains in petri dishes.
According to a study in the science journal Nature, biologists
at the Institute of Molecular Biotechnology in Vienna have
grown a human brain using stem cells. This brain isn't full-
grown; instead, it is small 3D sections of tissue that
apparently resemble the brain of a 9-week-old fetus. It is
about 3 to 4 millimeters in size.

Despite not being fully developed, this brain model still has
distinct regions of the brain, like the dorsal cortex, ventral
forebrain, and an immature retina.
"The parts are correctly organized, but not put together," said
study coordinator Juergen Knoblich, according to Popular
Science. Knoblich describes it as "a car where you have an
engine, you have the wheels -- but the engine is on the
roof... that car would never drive, but you could still take that
car and analyze how an engine works."

The goal of these scientists is to be able to use lab-grown
brains to study illnesses, like schizophrenia and autism.

Apparently, animal brains are too dissimilar from human
brains for conclusive studies on many types of neurological
diseases.

Scientists have created other body parts, like livers and heart
tissue, but these organs are nowhere near as intricate as a
brain. According to Popular Science, the 3D brain model
created by the Viennese researchers is the most complex in
vitro creation of tissue to date.

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