Dog domestication happened many times, but most didn't pan out
Briefly

The analysis of nitrogen isotopes in ancient wolf bones indicates a significant dietary shift around 13,600 years ago, hinting at early interactions between wolves and humans as some wolves began consuming fish, likely sourced from human activities.
At Hollembaek Hill, the remains of ancient canines reveal a complex mix of wild and domesticated traits, suggesting people cohabited with both pure wolves and wolf-dog hybrids, symbolizing an ancient bond between humans and canines.
Modern dogs share ancestry with a long-gone group of Siberian wolves, indicating that the domestication process was not singular but occurred independently across different regions, pointing to a shared but complex heritage.
Read at Ars Technica
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