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Pioneering Neuroscientist Dies

Marian Diamond, a former University of California, Berkeley, professor, discovered the first evidence for neuroplasticity and studied Einstein’s brain.

Jul 31, 2017
Diana Kwon

Diamond with a preserved human brainELENA ZHUKOVA

Marian Cleeves Diamond, a neuroscientist who discovered that the brain was malleable to life experiences, died on July 25 at the age of 90.

In the 1960s, Diamond’s experiments with rats revealed that animals raised in enriched cages were better able to navigate mazes and had thicker cerebral cortices than rodents that grew up with impoverished surroundings. This discovery came at a time when most scientists believed that nature, rather than nurture, was the key factor that shaped the brain.  

“The idea that the brain could change based on environmental input and stimulation was felt to be silly,” Robert Knight, a University of California, Berkeley, (UCB) professor of psychology and neuroscience, tells the Washington Post. “And that’s the boat she completely sunk.”

Diamond is also known for her investigations of Albert Einstein’s brain. After receiving four preserved slices of the physicist’s brain in 1984, she discovered that it contained an uncommonly high number of glia, cells that were once believed to merely be supporting structures in the brain. This paved the way for more than a decade of research that revealed that glia play a wide variety of roles in both health and disease.

Born in Glendale, California, Diamond attended Glendale Community College before transferring to UCB, where she received her bachelor’s, master’s, and doctorate degrees.

In 1955, Diamond became Cornell University’s first female science instructor. She returned to Berkeley as an anatomy professor five years later and taught there until she retired in 2014. Outside the traditional classroom, Diamond was also a popular lecturer on Youtube—one of her videos has amassed more than 1 million views.

According to the Washington Post, Diamond was known on campus as the “woman with the hat box” because she regularly carried a preserved brain around campus to use as a prop during her lectures.

“Marian Diamond [will be] remembered as an esteemed colleague, a friend and a gentle soul who by nature and nurture sought to extend happiness and accomplishment to her students, colleagues and others,” UCB colleague George Brooks, a professor of integrative biology, says in a statement.

Correction (August 1): Diamond became Cornell University’s first female science instructor in 1955, not 1995. The Scientist regrets the error.

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