The study, published in the Proceedings of the National Academy of Sciences (PNAS) of the United States, reveals that ...

The 'city killer' asteroid heading for Earth gives scientists a terrible surprise: it's bigger than expected A remarkable scene unfolded as a capuchin monkey was observed carrying a small puppy ...

When one member of a subgroup mastered the task, the others quickly imitated them, with the result that 57.5% of the monkeys managed to retrieve the food reward. In the smaller, closer-knit groups ...