Hidden high in the White Mountains of eastern California, a gnarled, weathered tree quietly holds a staggering secret — it’s nearly 5,000 years old.

Melissa Avelino is a data journalism student at Augustana University. In this five-part series, she looks at the changing ...

Scientific applications are commonly modeled as the processing of directed acyclic graphs of tasks, and for some of them, the graph takes the special form of a rooted tree. This tree expresses both ...