Discover the power of a burn up chart. See examples, learn how to create one, and track scope, progress, and team performance ...

A version of this story appears in the September 2020 issue of National Geographic magazine. Philadelphia detected its first case of a deadly, fast-spreading strain of influenza on September 17, 1918.

Paper is used regularly in industries such as packaging, food and beverage, hospitality, home utilities, corporate and personal care. With major public venues like stadiums, malls, restaurants and ...