Does your cat prefer to sleep on their left side? Scientists have investigated why...

Researchers found that 65% of cats sleep on their left side and only 35% prefer the right — this trait may have evolved as a way of responding to danger and for hunting prey more efficiently

Alanna, the black cat belonging to Richard Collins, likes to sleep on her left side. Picture: Aengus Collins 

Why do I snore? What possible purpose does it serve?

Our ancient hominid ancestors can’t have snored; the noise would have drawn predators, such as leopards, to the sleeper. Natural selection would soon have eliminated such a tendency.