A writer for the Sacramento Bee explains what the circadian clock is and why it matters.

We have the opportunity now to live a healthier life with the knowledge we’ve accumulated about circadian clocks and especially about the health effects of modern lifestyles and innovations such as computers, smartphones, intercontinental flights, dark indoor offices and lecture halls and restaurants that stay open until 2 a.m. Better aligning your daily activities with natural day-night cycles will surely help, but that will take discipline.

Read the rest at www.sacbee.com