In our fast-paced modern world, the pursuit of the perfect night's sleep often seems like a never-ending quest. While many of us have tried endless cups of chamomile tea or counted more sheep than we'd like to admit, the true key to understanding our sleep patterns might lie within us. Enter circadian rhythms, the unsung heroes of our body clocks, orchestrating everything from sleep to metabolism. But what are they, and how exactly do they influence our sleep?