Melanesian blond hair independent mutation

Blond hair evolved independently in parts of the Pacific

Some people in the Solomon Islands have naturally blond hair despite having dark skin and little recent European ancestry. Researchers identified a genetic variant associated with this trait that differs from common European blond-hair variants. Similar appearances can therefore arise through different genetic changes in separate populations.

Replacing ozone-damaging gases brought a climate cost

CFCs and HCFCs used in air conditioners damaged the ozone layer. HFCs were introduced to replace them, but they worsen climate change. Newer HFO refrigerants have no ozone-depletion potential and much lower global-warming potential.

AI safeguards can be removed after model weights are released

If an AI model's trained weights are released publicly, people can make their own copies and modify them. They may be able to remove safeguards such as refusal rules. Once many copies have spread online, the original creator cannot simply delete all of them.

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Melanesian blond hair independent mutation

Blond hair evolved independently in parts of the Pacific

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