Climate change is having more complicated impacts than we imagined, and they're really hard to predict. Some animals are getting smaller at a faster rate than others. And so trying to predict what will happen to a given species is really difficult.
A recent study of tens of thousands of birds has shown that birds are growing smaller over time. It could be due to climate change, and if so, we ought to consider: How else might humans be altering the literal shape of life on Earth — now and in the future?
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