Researchers designed a simulation to show when finch species started to diverge. One definitive way to link ecological changes to evolution would require a time machine. Traveling both backward and ...

For ecologists, the Covid-19 pandemic has presented a remarkable natural experiment in what can happen to wild animals when humans stay home. By Emily Anthes About two decades ago, the dark-eyed junco ...

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Bird beaks come in almost every shape and size—from the straw-like beak of a hummingbird to the slicing, knife-like beak of an eagle. We have found, however, that this incredible diversity is ...