This week, pigeons with GPS systems show how birds of a feather flock together, how gut bacteria vary with diet, and the effects of livestock on the greenhouse gas nitrous oxide. Plus, the usual news round-up and the best stuff elsewhere in Nature.
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Experiments reveal that crabs and lobsters feel pain
US research ethics agency upholds decision on informed consent
Chemistry credit disputes under the spotlight
Chemistry credit disputes under the spotlight
Contamination created controversial ‘acid-induced’ stem cells