Better protecting them from the negative effects of those parasites
A wild bearded capuchin monkey is striking an intact piaçava nut with a quartzite stone hammer. (Photo by Barth Wright) By Alan Flurry Millions of years ago, before humans became fully bipedal, ancestral hominins used stones to break bones and nuts, probably while standing upright. A new study from the Primate...
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Migrating monarch butterflies that mix with year-round residents have higher rates of parasite infection