![Rare Human Syndrome May Explain Why Dogs are So Friendly](https://s2.storage.snapzu.com/ec/7f/53/4a/Gozzin/snaps/b2/54/190401/thumbs/30f410935910fb0e_fpi_large.jpg)
(Inside Science) -- When it comes to sheer friendliness, few humans can match the average dog. But people with Williams syndrome may come close, their unusual genetics granting them a puppyish zeal for social interaction. Now, scientists have found that extreme friendliness in both species may share common genetic roots.
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