A PriorityQueue is a list that always keeps its items sorted based on some rule, like smallest to largest. So, when you take an item out, you always get the one with the highest (or lowest) priority.

Language learning has traditionally followed a one-size-fits-all approach—static syllabi, fixed lesson progressions, and ...

In an industry where 90 percent of drug candidates fail before reaching the market, a handful of startups are betting ...