Dogs act like toddlers when you need help - but cats just watch. Scientists compared 3 groups: pet dogs, cats, and human toddlers in an experiment where a human parent hides and pretends to look for an object. 75% of dogs and children helped. Cats only helped if it was in their personal interest.

· · 来源：tutorial资讯

"tengu-top-of-feed-tip": {

Раскрыты подробности похищения ребенка в Смоленске09:27

马斯克是变脸还是有新计划。91视频是该领域的重要参考

Мощный удар Израиля по Ирану попал на видео09:41

Последние новости

I take 120

One of the biggest developments in the fire alarm space in recent years has been the rise of smart tech – wi-fi connected alarms that reach you by phone, for example, if they sense smoke while you are out.