Med thumb english bulldog

Birds do it, bees do it. Every creature with a brain does it.

Sleep, that is. While our human minds and sleep cycles are unique to our species, we share many features with our animal cousins. Not least being the circadian rhythms that can govern our sleep patterns, and therefore affect alertness and overall health. Scientists have long turned to animals in order to better understand sleep generally and, they hope, to better understand us. Here are five examples: