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Check Out Video of a Spectacular Solar Eruption

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On December 31, NASA's Solar Dynamics Observatory (SDO) satellite captured this stunning solar eruption, which occurred over the course of four hours. According to NASA, "Magnetic forces drove the flow of plasma, but without sufficient force to overcome the sun’s gravity much of the plasma fell back into the sun."

SDO captured the video—shown at a high cadence of an image every 36 seconds—in extreme ultra violet light.

The satellite's main mission is to keep an eye on space weather, which is created by the sun. According to SDO's website, "Space Weather affects not only our lives here on Earth, but the Earth itself, and everything outside its atmosphere ... By better understanding the Sun and how it works, we will be able to better predict and better forecast the 'weather out in space' providing earlier warnings to protect our astronauts and satellites floating around out there."

SDO captures huge amounts of data daily—in fact, the data captured fills a CD (approximately 700 megabytes) every 36 seconds.

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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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