アメリカ自然史博物館さんのインスタグラム写真 - (アメリカ自然史博物館Instagram)「Happy #NationalDogDay! Take a moment to appreciate the amazing evolutionary history of members of the dog family, Canidae. Dogs evolved from a shared ancestor with wolves at least 10,000 years ago. Studies show that, compared to wolves, canines are generally more interested in humans and more cooperative with their commands. Scientists think that there’s a genetic basis for this bond, with hypersocial dogs carrying variants of genes that underpin their friendly behavior. Other researchers argue that humans may have bred a behavioral syndrome into dogs as canines were domesticated over the years. Some research also suggests that dogs can read human facial expressions and intonation, display empathy, and even communicate jealousy—and may read our gestures more readily than one of our closest relatives, chimpanzees, can. Celebrate by sharing a picture of your pup with us on Twitter or Facebook! Photo: bella67, pixabay」8月26日 22時59分