What Do They Call Earthquakes on Other Planets?

iStock/SteveCollender
iStock/SteveCollender

I completely missed out on Tuesday's earthquake. I was riding public transportation in Philadelphia and uncontrollable shaking is to be expected. But all this talk about earthquakes made us wonder—what do they call seismic activity on other planets? Are there jupiterquakes? Uranusquakes?

It turns out, there are not.

First of all, not all planets are as geologically active as ours. There is evidence of seismic activity on Mars and maybe on Venus. Some of Jupiter's moons and Saturn's moon are tectonically active and may have seismic activity, too. Our own moon also is seismically active. But definitely no uranusquakes.

Even on the moon and Mars, though, seismic rumblings are still called earthquakes, because the term refers to earth in the sense of raw dirt, not Earth the name of the planet.

Friday’s Best Amazon Deals Include Digital Projectors, Ugly Christmas Sweaters, and Speakers

Amazon
Amazon
As a recurring feature, our team combs the web and shares some amazing Amazon deals we’ve turned up. Here’s what caught our eye today, December 4. Mental Floss has affiliate relationships with certain retailers, including Amazon, and may receive a small percentage of any sale. But we only get commission on items you buy and don’t return, so we’re only happy if you’re happy. Good luck deal hunting!

What Are Sugar Plums?

Marten Bjork, Unsplash
Marten Bjork, Unsplash

Thanks to The Nutcracker and "'Twas the Night Before Christmas," sugar plums are a symbol of the holidays. But what are sugar plums, exactly? Like figgy pudding and yuletide, the phrase has become something people say (or sing) at Christmastime without knowing the original meaning. Before it was the subject of fairy dances and storybook dreams, a sugar plum was either a fruitless candy or a not-so-sweet euphemism.

According to The Atlantic, the sugar plums English-speakers ate from the 17th to the 19th century contained mostly sugar and no plums. They were made by pouring liquid sugar over a seed (usually a cardamom or caraway seed) or almond, allowing it to harden, and repeating the process. This candy-making technique was called panning, and it created layers of hard sugar shells. The final product was roughly the size and shape of a plum, which is how it came to be associated with the real fruit.

Before the days of candy factories, these confections could take several days to make. Their labor-intensive production made them a luxury good reserved for special occasions. This may explain how sugar plums got linked to the holidays, and why they were special enough to dance through children's heads on Christmas Eve.

The indulgent treat also became a synonym for anything desirable. This second meaning had taken on darker connotations by the 17th century. A 1608 definition from the Oxford English Dictionary describes a sugar plum as “something very pleasing or agreeable, esp. when given as a sop or bribe.” Having a "mouthful of sugar plums" wasn't necessarily a good thing, either. It meant you said sweet words that may have been insincere.

As true sugar plums have fallen out of fashion, demand for Christmas candy resembling the actual fruit has risen. You can now buy fancy candied plums and plum-flavored gummy candies for the holidays, but if you want something closer to the classic sugar plum, a Jordan almond is the more authentic choice.