As you may already know, the corona in coronavirus has no relation to a certain refreshing beer often served with a slice of lime. Corōna means “crown” in Latin—and Spanish and Italian, too—and virologists chose it in 1968 to describe the group of viruses characterized by crown-like spikes that protrude from their surfaces.

So how do other viruses and diseases get their names? Based on the infographic below, created by Adam Aleksic for his website, The Etymology Nerd, there isn’t just one way. Some, like the coronavirus, are named for how they look under a microscope. The rota in rotavirus, for example, which means “wheel” in Latin, reflects the virus’s wheel-like appearance when viewed beneath an electron microscope.

Others are named after the locations where they were discovered or studied. In 1947, scientists named a newly identified mosquito-borne virus after Uganda’s Zika Forest. In 1977, Yale researchers investigating a string of pediatric arthritis cases in the town of Lyme, Connecticut, started referring to the illness as “Lyme arthritis.” Later, the name was modified to “Lyme disease” when scientists realized patients were exhibiting other symptoms, too.

Still others are characterized by the symptoms they cause. People with tetanus—from the Greek tetanos, for “tension”—usually experience muscle stiffness, and the skin of yellow fever sufferers often takes on a yellow tint due to jaundice.

Find out the origins of malaria, measles, and more below. And follow The Etymology Nerd on Instagram for more fascinating etymological explanations.

Unsurprisingly, there's a lot of Latin in this infographic.

The Etymology Nerd

Daylight saving time was created to benefit Americans, but not every part of the country is affected equally. Within the Eastern time zone, for instance, the sun rises a whole 40 minutes earlier in New York City than it does in Detroit. To illustrate how daylight saving time impacts sunrise and sunset times around the county, cartographer Andy Woodruff published a series of helpful maps on his website.

Below, the map on the left depicts how many days of reasonable sunrise time—defined as 7 a.m. or earlier—each part of the country is getting. The regions in the yellow sections have the most days with early sunrises and the darker parts have the fewest. On the right, the second map shows how many sunsets past 5 p.m. we’re getting each year, which appear to be a lot more abundant

Next, he visualized what these sunrise and sunset times would look like if daylight saving were abolished completely, something many people have been pushing for years. While our sunset times remain pretty much the same, the mornings start to look a lot sunnier for people all over the country, especially in places like West Texas.

And for those of you who were curious, here’s what America would look like if daylight saving time were in effect year-round. While mornings would look miserable pretty much everywhere, there’d at least be plenty of sunshine to enjoy once we got off work.

You can tinker with an interactive version of the daylight saving map on Woodruff’s blog.

All images courtesy of Andy Woodruff.

This article originally ran in 2015.