See What It Looks Like to Land on Saturn's Largest Moon, Titan

In 2005, the European Space Agency's Huygens probe—which had been sent into space with its mothership, NASA’s Cassini spacecraft, to learn more about Saturn and its moons—became the first spacecraft to land on an object in the outer solar system. That object was Titan, a hazy, planet-like moon of Saturn. Now, 12 years after the historic voyage, Mashable reports that NASA has released a video of Huygens's descent.

Huygens took samples of Titan’s atmosphere and captured hundreds of photos of the moon. These images revealed a new, alien world with rugged mountains, dramatic gorges, and dark drainage channels that were suggestive of liquid methane rivers.

“The Huygens images were everything our images from orbit were not,” planetary scientist Carolyn Porco, who worked as the Cassini imaging team lead at the Space Science Institute in Boulder, Colorado, said in a NASA press release. “Instead of hazy, sinuous features that we could only guess were streams and drainage channels, here was incontrovertible evidence that at some point in Titan's history—perhaps even now—there were flowing liquid hydrocarbons on the surface. Huygens's images became a Rosetta Stone for helping us interpret our subsequent findings on Titan."

The Huygens probe only transmitted data during its descent; after it landed on Titan, it went silent. The Cassini spacecraft has continued to explore Titan from above, capturing images of sand dunes and lakes of liquid methane and ethane. Cassini is currently in its final year of exploration; its mission is slated to end in September 2017.

In the video below, you can relive the Huygens probe's historic descent, from atmospheric entry to touchdown.

[h/t Mashable]

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'Lime Disease' Could Give You a Nasty Rash This Summer
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A cold Corona or virgin margarita is best enjoyed by the pool, but watch where you’re squeezing those limes. As Slate illustrates in a new video, there’s a lesser-known “lime disease,” and it can give you a nasty skin rash if you’re not careful.

When lime juice comes into contact with your skin and is then exposed to UV rays, it can cause a chemical reaction that results in phytophotodermatitis. It looks a little like a poison ivy reaction or sun poisoning, and some of the symptoms include redness, blistering, and inflammation. It’s the same reaction caused by a corrosive sap on the giant hogweed, an invasive weed that’s spreading throughout the U.S.

"Lime disease" may sound random, but it’s a lot more common than you might think. Dermatologist Barry D. Goldman tells Slate he sees cases of the skin condition almost daily in the summer. Some people have even reported receiving second-degree burns as a result of the citric acid from lime juice. According to the Mayo Clinic, the chemical that causes phytophotodermatitis can also be found in wild parsnip, wild dill, wild parsley, buttercups, and other citrus fruits.

To play it safe, keep your limes confined to the great indoors or wash your hands with soap after handling the fruit. You can learn more about phytophotodermatitis by checking out Slate’s video below.

[h/t Slate]

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Why Eating From a Smaller Plate Might Not Be an Effective Dieting Trick 
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It might be time to rewrite the diet books. Israeli psychologists have cast doubt on the widespread belief that eating from smaller plates helps you control food portions and feel fuller, Scientific American reports.

Past studies have shown that this mind trick, called the Delboeuf illusion, influences the amount of food that people eat. In one 2012 study, participants who were given larger bowls ended up eating more soup overall than those given smaller bowls.

However, researchers from Ben-Gurion University in Negev, Israel, concluded in a study published in the journal Appetite that the effectiveness of the illusion depends on how empty your stomach is. The team of scientists studied two groups of participants: one that ate three hours before the experiment, and another that ate one hour prior. When participants were shown images of pizzas on serving trays of varying sizes, the group that hadn’t eaten in several hours was more accurate in assessing the size of pizzas. In other words, the hungrier they were, the less likely they were to be fooled by the different trays.

However, both groups were equally tricked by the illusion when they were asked to estimate the size of non-food objects, such as black circles inside of white circles and hubcaps within tires. Researchers say this demonstrates that motivational factors, like appetite, affects how we perceive food. The findings also dovetail with the results of an earlier study, which concluded that overweight people are less likely to fall for the illusion than people of a normal weight.

So go ahead and get a large plate every now and then. At the very least, it may save you a second trip to the buffet table.

[h/t Scientific American]

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