Leaving the workforce marks a transition that can feel liberating for some and unsettling for others. After decades of ...

Scientists have long focused on quantifying fear and other negative emotions in animals. Now they’re trying to measure positive feelings — and it’s a challenge.

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 ...

Nocturnal means of or ‘relating to’ the night. Whilst it’s most commonly used to describe nighttime animals and birds, such as bats, mice, hedgehogs and barn owls, plants can be nocturnal too.