Why humans are the only creatures who cannot survive on raw food
In short: We share roughly 95% of our DNA with our closest relatives, leading many to view humans as merely 'shaved monkeys.' However, a closer look at our biology reveals a radical trajectory of loss and specialized gain that separates us from the animal kingdom.
While our genetic similarity to our closest relatives is high, the physical evolution of the human body over the last seven million years is defined largely by what we have lost. Since splitting from a common ancestor, humans have developed characteristics like baldness and weaker muscles, moving away from the physical traits of our primate relatives. This evolutionary path suggests that our identity is shaped as much by the shedding of ancestral traits as by the acquisition of new ones. One of the most profound biological distinctions is our inability to survive on a raw diet. Unlike almost every other creature, humans possess digestive enzymes that have been so enfeebled and guts so reduced that we are functionally dependent on an 'external stomach.' To survive, we require the intervention of a frying pan or a microwave to process our food.
This biological vulnerability is a defining marker of the human condition, marking a transition from independent survival to a reliance on external technology. In contrast to these physical losses, the human brain represents a striking gain. While our bodies have simplified in many ways, the brain has undergone significant improvements compared to the chimpanzee. Professor Steve Jones explores these tensions between our animal origins and our unique biological trajectory, suggesting that while we may share a common ancestor, the human experience is defined by a radical departure from the standard animal model.
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Sources
- Summary by Intellect · source: Is Man Just Another Animal? - Professor Steve Jones
- Also: Is Man Just Another Animal?
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