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Study Links Body Temperature to Brain Size Evolution

11/5/2025

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Summary

Story summary

A global study by researchers at the Max Planck Institute shows that body temperature stability and parental investment drive brain-size evolution in vertebrates.
Warm-blooded mammals and birds sustain larger brains because stable internal temperatures meet the energy demands of bigger brains.
The research notes that species producing larger offspring develop bigger brains, and that humans evolved the largest brains relative to body size due to high temperatures and extensive care.

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Story summary

A global study by researchers at the Max Planck Institute shows that body temperature stability and parental investment drive brain-size evolution in vertebrates.
Warm-blooded mammals and birds sustain larger brains because stable internal temperatures meet the energy demands of bigger brains.
The research notes that species producing larger offspring develop bigger brains, and that humans evolved the largest brains relative to body size due to high temperatures and extensive care.