Until a few decades ago, play was considered a behavior unique to birds and mammals.
Although play in other vertebrates is still a neglected research subject, data on it has been …

Enrichment has become a key aspect of captive husbandry practices as a means of
improving animal welfare by increasing environmental stimuli. However, the enrichment …

Though we cannot directly assess consciousness in non-human animals, an increasing
number of researchers are adopting the marker approach–amassing evidence of behaviors …