Emma Watson, Jake Gyllenhaal, journalist Fiona Bruce and Barack Obama all walk into a sheep pen. No, this isn’t the beginning of a baaa-d joke. By training sheep using pictures of these celebrities, ...
We trained 20 sheep (Ovis aries) to discriminate in a choice maze between pictures showing frontal views of 25 pairs of sheep faces (Fig. 1a) by associating one member of each face pair with a food ...
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