These days, Internet connectivity is ubiquitous, so you can look up live weather data on just about any device around you.

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.

Medicine can get into your body in a few different ways. You can swallow a pill, drink a liquid, or get a shot. A suppository is another way to deliver a drug. It's a small, round or cone-shaped ...