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Human brains growing larger with each generation, study shows

A recent study conducted by the University of California Davis Health has unearthed a startling revelation: the human brain has been steadily expanding across generations. This suggests that the brains of present-day individuals boast significantly larger dimensions compared to those of their ancestors.

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Researchers speculate that this upward trend in brain size may yield favorable implications for long-term brain health. They theorize that a larger brain might harbor greater “reserve,” potentially serving as a protective buffer against age-related cognitive decline, such as Alzheimer’s disease.

Utilizing MRI scans from participants born between the 1930s and 1970s as part of the Framingham Heart Study, scientists scrutinized the data.

Their analysis revealed that infants born in the 1970s exhibited a notable 15% increase in brain surface area and a 6.6% augmentation in brain volume compared to those born in the 1930s.

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Remarkably, these increments persisted across successive decades, even after accounting for variables such as height, sex, and age.

Furthermore, the study underscored a concurrent enlargement in brain regions associated with memory and learning, including the gray matter of the cerebral cortex, white matter, and the hippocampus.

While the precise ramifications of burgeoning brain size on long-term cognitive well-being remain elusive, researchers underscore the significance of adult brain volume as a pivotal predictor of cognitive function in later life.

Intriguingly, the study aligns with a corresponding decline in dementia incidence, decreasing by approximately 13% per decade.

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Experts postulate that augmented brain volume may signify enhanced brain development and resilience against age-related neurodegenerative conditions like Alzheimer’s disease.

Emphasizing the dynamic evolution of the human brain, scientists stress that enlarged brain size, while not directly correlated with heightened intelligence, could furnish a vital reservoir for maintaining brain health in old age.

Yet, comprehensive investigations are warranted to unravel the full extent of this growth’s impact on cognitive longevity.

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Jake Carter

Jake Carter is a researcher and a prolific writer who has been fascinated by science and the unexplained since childhood.

He is not afraid to challenge the official narratives and expose the cover-ups and lies that keep us in the dark. He is always eager to share his findings and insights with the readers of, a website he created in 2013.

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