Memorable Brains: Einstein, the cerebellum and animal intelligence on NPR Short Wave

In this retirement retrospective from NPR Short Wave, host Regina Barber chats with neuroscience veteran John Hamilton about some of the most memorable brains he has covered. The conversation spans a dramatic range from a cerebellum missing in a patient to the infamous theft and study of Einstein’s brain, and it highlights how neuroscience has shifted from neuron-centric views to recognizing the roles of glial cells and neural networks. The episode also explores animal intelligence through tool use and the rich diversity of autistic thinking as a source of insight into social cognition. The show closes with a focus on the tiny but mighty fruit fly brain and the broader quest to understand brain connectivity.

• The cerebellum’s broad influence beyond movement includes information processing and emotion coordination
• Einstein’s brain story reveals how astrocytes may contribute to high-level cognition
• Animal tool use challenges the idea that such behavior is uniquely human
• Autistic minds can illuminate social processing and cooperation in novel ways

Overview

The podcast episode gathers reflections from Regina Barber and the retiring NPR neuroscience correspondent John Hamilton. Rather than presenting new data, the discussion surveys a gallery of memorable brains that Hamilton has reported on over the years. The tone blends science storytelling with humanity, illustrating how brain science has broadened its focus from neurons to the supporting cast of glial cells, and from isolated brain regions to interconnected networks. The episode uses four rugged case studies to illustrate this shift: a cerebellum story grounded in a real patient, the Einstein brain saga with its curious journey through autopsy relics, animal intelligence moments in the wild and captivity, and finally a portrait of an autistic brain that reframes what it means to socialize and learn. The final segment centers on a deeper curiosity about the small, well-mapped fruit fly brain and its navigational prowess, offering a throughline about connectomes and the limits of what connectomes alone can reveal.

The cerebellum and its wide reach

The first core story discusses a man named Jonathan Kelleher who reportedly never had a working cerebellum. The cerebellum is described as roughly the size of a fist at the brain’s base, containing a large share of neurons, and crucial for balance, eye tracking, and even social and language functions. John Hamilton explains that in individuals missing a cerebellum, balance and coordination are impaired, but the tale extends beyond motor control to show how this structure coordinates information and emotion across the brain. The exchange underscores a broader view of the cerebellum as a hub of integration rather than a mere movement center, reshaping how researchers think about cognitive and social processes anchored in this region.

Einstein’s brain and the astrocyte mystery

The Einstein brain narrative unfolds with the pathologist who performed the autopsy in 1955 taking Einstein’s brain. Over decades, fragments of the brain were sent to various scientists, with the initial examinations finding mostly ordinary features. A pivotal moment arrives in the 1980s when Marion Diamond at UC Berkeley analyzed samples mailed in a mayonnaise jar and found surprisingly high numbers of astrocytes, a type of glial cell, rather than neurons. The discussion emphasizes how glial cells, often overlooked as mere support cells, are now recognized to play significant roles in higher brain functions, potentially influencing processes that underpin intelligence and creativity. The segment reflects on the enduring questions about what makes Einstein’s brain unique, suggesting that glia and non-neuronal cell types merit serious consideration in the science of genius.

Underdog brains: tools, birds, and beasts

The podcast then shifts to animal minds, recounting Jane Goodall’s chimpanzee David Greybeard tools and later crow innovations in the realm of tool use. Hamilton describes a 2011 field encounter at the Indianapolis Zoo where orangutans demonstrated a forming of reaching tools to manipulate equipment, effectively using branches to draw in a microphone. The story underscores how tool use has evolved from a presumed human privilege to a shared cognitive skill across species, illustrating the importance of direct observation in revealing the sophistication of animal minds and challenging long-held assumptions about cognitive boundaries between humans and other animals.

The autistic brain and social cognition

The conversation introduces Dax Daxer, an autistic college student who spoke to John Hamilton in 2010. Dax describes feeling like a space explorer among neurotypical peers, noticing and valuing patterns others might miss. The host notes how autistic perspectives can illuminate the patterns of social interaction and cooperation, highlighting a narrative of neurodiversity that reframes what constitutes social intelligence and belonging. The segment elevates the view that autism can bring unique strengths and insights into human cooperation, rather than solely presenting deficits.

A quest for understanding a fruit fly brain

In the closing portions Hamilton reveals a long-standing curiosity about understanding a fruit fly brain. The genome-level map of connections, or connectome, has advanced, but the real challenge remains understanding how such a tiny brain executes complex three-dimensional navigation. The discussion of Drosophila connectomics underscores how the smallest brains can inspire big questions about computation and behavior, and why researchers continue to pursue deeper explanations beyond connectomes alone.

Takeaways and reflection

The episode culminates with expressions of gratitude to the many brains that fuel Short Wave and a nod to the broader trajectory of neuroscience: from neuron-centric views to a more nuanced appreciation of glia, neural networks, animal cognition, neurodiversity, and the remarkable capabilities of small brains. The credits acknowledge the production team, while the conversation leaves a lasting impression about what neuroscience has become and where it might go next.