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：book资讯

设计大赛公布之后，我们陆续收到了很多精彩的投稿，在此先感谢参与者们的支持。同时我们也收到了询问，表示春节假期其实并没有太多自己的时间，希望大赛截稿日期可以延后。BeatBox 共创项目组内部讨论过后，决定将投稿截止日期顺延至【3 月 15 日 23:59 分】。相应的投票、赛果公布等流程也同样顺延，希望感兴趣的设计师们不要错过啦～如有其它疑问或想法建议，欢迎在本文评论区留言。

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February has been a turbulent month for DJI. The Chinese tech giant, best known for making drones, escalated its fight against the U.S. drone ban by suing the FCC. Then the internet erupted over an entirely different DJI device: The Romo robot vacuum.

Jim Lovell spoke to the BBC about Apollo 13Apollo 13: Bonus 1. Jim Lovell

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