Here’s what you’ll learn when you read this story:Our biological clock, or circadian rhythm, is immensely important to our health, and scientists are now unpacking the process’s secrets at the cellular level. Researchers successfully created synthetic, cell-like structures, or vesicles, to test how varying concentrations of so-called “clock proteins” affect the vesicles’ natural timekeeping. The team—amongst other discoveries—found that clock accuracy was proportional to both the amount of clock proteins and vesicle size. Known as our biological clock or circadian rhythm, this natural process regulates our wake-sleep cycle and is highly attuned to Earth’s 24-hour rotation. Related Story This Would Be the Most Accurate Clock Ever MadeIn this study, the authors used cyanobacterial clock proteins KaiA, KaiB, and KaiC.