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What Do They Call Earthquakes on Other Planets?

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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.

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science
Belly Flop Physics 101: The Science Behind the Sting
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Belly flops are the least-dignified—yet most painful—way of making a serious splash at the pool. Rarely do they result in serious physical injury, but if you’re wondering why an elegant swan dive feels better for your body than falling stomach-first into the water, you can learn the laws of physics that turn your soft torso a tender pink by watching the SciShow’s video below.

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What's the Saltiest Water in the World?
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Saltwater is common around the world—indeed, salty oceans cover more than two-thirds of the globe. Typical saltwater found in our oceans is about 3.5% salt by weight. But in some areas, we find naturally occurring saltwater that's far saltier. The saltiest water yet discovered is more than 12 times saltier than typical seawater.

Gaet’ale is a pond in Ethiopia which currently holds the record as the most saline water body on Earth. The water in that pond is 43.3% dissolved solids by weight—most of that being salt. This kind of water is called hypersaline for its extreme salt concentration.

In the video below, Professor Martyn Poliakoff explains this natural phenomenon—why it's so salty, how the temperature of the pond affects its salinity, and even why this particular saltwater has a yellow tint. Enjoy:

For the paper Poliakoff describes, check out this abstract.

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