More distantly related primates, including gorillas, laugh, and anecdotal evidence suggests that other social mammals may do too. Scientists are currently testing such stories with a comparative analysis of just how common laughter is among animals. So far, though, the most compelling evidence for ...
2023 年 3 月大学英语六级考试真题 第(1 套) Part I Writing (30 minutes) Directions: For this p art, y ou are allowed 30 minutes to write an essay that begins with the sentence 9 “Peop le are now increasingly aware of the danger of iapp earance anx iety or being f obsessed with ...
country, or state, which we will discuss further. The US Federal Animal Welfare Act [89] does not apply to pet animals (with the exception of dealers where minimum care is promulgated), and individual states and territories regulate the treatment of pet animals. Most US states and ...
Inconsistences in unlearned colour preferences could also be explained by prior experience of the animals tested, who, in most cases, had experienced food, social partners, parents, etc., before their colour and shape preferences were tested (e.g. Mastrota and Mench1995; Roper1990; Roper and ...
Three decades after the groundbreaking researcher was killed in Rwanda, the ape population is growing—but is under rising pressure.
Yes, this includes dogs, especially when they are not neutered or spayed (which, shockingly, most non-domesticated pets are not). Yet no one interprets this behavior as a cry for freedom. They probably understand that their dog or cat got confused and headed in the wrong direction, or ...
a greater potential to raise within the rank system themselves and/or due to a comparatively reduced ‘stress’ level in comparison to the male birds, the latter linked to females essentially living in groups as part of their species’ social habits whilst males tend to be relatively solitary....
Two hundred thousand years or so ago an isolated group of primates evolved into a species that became aware of itself. Like a child peering into a looking glass, it was fascinated by what it saw looking back from still water. “That is me,” it marveled. “I am.” It was the discove...
After accounting for other factors that could led to successful latch-opening, such as manual dexterity and sociality, the researchers concluded that relative brain size was the most significant predictor of success in the task. Differences in brain size within a species, such as humans, are ...
and, bringing the domestication story full circle, some of these fully domesticated dogs work as social hunters. It is the minority group of companion and working dogs that provides the subjects for most studies of canine cognition; but which of these four ecological niches truly defines a dog?