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1日 · 朱文 · 来源：class资讯

given a stack of punched cards encoding transactions, they produced a ledger

Americans are destroying Flock surveillance cameras

Nature, Published online: 25 February 2026; doi:10.1038/s41586-026-10159-6

US man dep

Ten of its KR1 robots are undergoing trials in commercial settings. They can be fitted with different grippers, depending on what the robot has to do. Strong "gorilla" pincers are used for picking up heavier boxes or, for more delicate items, a suction device can be used.