Are animals happier than humans? Science is divided on how their feelings compare to ours.
Kangaroo playing air guitar wins top prize
Guitar hero: Perth’s Jason Moore captured a would-be Jimi Hendrix of the kangaroo world. Glossary
Air guitar - An imaginary guitar "played by someone miming to rock music.
Humour - The ability to find things funny, or the things you find funny.
Parakeets - A small parrot with green plumage.
Mammals - Warm blooded animals where the female gives birth to live young.
Peak - At the highest level; maximum. Since the early 00s, there has been a surfeit of high-quality television dramas, often starring Hollywood actors. This era has been referred to as Peak TV, or the Golden Age of Television.