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

Последние новости

Best for Big Ten games

Nicky Bandini，推荐阅读体育直播获取更多信息

�@EMEA�ł�4���ɔ��������\���ŁA�ŏ��\�����i��1699���[���i��31��2700�~�j�ƂȂ��B

The authorities in South Sudan have said at least 169 people, including senior officials, were killed on Sunday when a group of unidentified men launched an assault on an area in the north of the country.

The best m

Дания захотела отказать в убежище украинцам призывного возраста09:44