Study explains why ‘staying quit’ gets harder the longer you’re cigarette-free.

Our Management Tip of the Day newsletter continues to be one of HBR’s most popular newsletters. In this article, we’ve compiled seven of our favorite Tips on leading through uncertainty, from how to become a more courageous leader to how to communicate with your team when times are tough.

Earth’s natural cooling feedbacks can sometimes overshoot, driving temperatures below their starting point.