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.

2026年1月22日 · 吴鹏 · 来源：digital资讯

Nature, Published online: 25 February 2026; doi:10.1038/d41586-026-00570-4

There’s a new option in Applications → Defaults to select your default PDF viewer, and we’ve slightly tweaked the icon for Background Activity permissions to be a bit cuter.

For multiple readers

Birmingham

履行网络犯罪防治义务的具体要求，由法律、行政法规或者国家标准的强制性要求作出规定。相关国家标准由国务院公安部门、国家网信部门、国务院标准化行政主管部门会同行业主管部门等制定。