A tiger walks the same worn groove along the edge of its exhibit, like a broken record. A parrot methodically plucks out its own feathers until bare skin shows through. To a casual visitor, these can ...

Across captive settings, nonhuman primates may develop an array of abnormal behaviors including stereotypic and self-injurious behavior. Abnormal behavior can indicate a state of poor welfare, since ...

Too much TV might not make your child's eyes go square, but it may affect their ability to process the world around them, scientists have said. The data adds to a growing number of concerning ...