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

Around 200 of these hands are in use, mostly by researchers at universities and tech firms.

Раскрыты подробности похищения ребенка в Смоленске09:27

The Ecovac，更多细节参见Line官方版本下载

Филолог заявил о массовой отмене обращения на «вы» с большой буквы09:36

В российском городе в квартире пенсионерки рухнул потолокВ Батайске в квартире пенсионерки из-за протечки крыши рухнул потолок

本版责编

Nasa announces change to its Moon landing plans