Why parrots sometimes adopt—or kill—each other's babies

Infanticide and adoption in the animal kingdom have long puzzled scientists. While both males and females of many species are known to kill the babies of their rivals to secure sexual or social advantage, other animals have ...

A nudge to resume economic activity

In these pandemic-affected times, concern about COVID-19 can make it hard to know when to take part in "normal," prepandemic activities. That may be especially true this winter, with the Omicron virus variant spreading and ...

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