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Apennine Bears Evolve to Friendliness Amid Isolation

1/5/2026

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Summary

Story summary

A study finds Apennine brown bears in Central Italy are evolving to be friendlier and less aggressive.
Isolation for 2,000–3,000 years has yielded unique physical traits and genetic signatures linked to reduced aggressiveness.
Researchers say decline in aggressive bears, driven by human hunting, has allowed calmer individuals to breed.
In related research, climate change is causing genetic adaptations in polar bears that may aid survival.

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Story summary

A study finds Apennine brown bears in Central Italy are evolving to be friendlier and less aggressive.
Isolation for 2,000–3,000 years has yielded unique physical traits and genetic signatures linked to reduced aggressiveness.
Researchers say decline in aggressive bears, driven by human hunting, has allowed calmer individuals to breed.
In related research, climate change is causing genetic adaptations in polar bears that may aid survival.