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Scientists from NASA confirmed this morning that liquid water flows on Mars. Salts occurring in the Martian soil prevent the water from freezing just like the salt we put on roads here on Earth.

Dark streaks known as recurring slope lineae (RSL) grow up to a few hundred meters in length and are formed by briny liquid water. These streaks lengthen and get darker in the warmer months and fade away in the cooler parts of the year. For years it has been hypothesized that they were created by water but there was no evidence until now. Spectrometer observations of the RSL show signatures of hydrated salts which confirm the hypothesis.

“We found the hydrated salts only when the seasonal features were widest, which suggests that either the dark streaks themselves or a process that forms them is the source of the hydration. In either case, the detection of hydrated salts on these slopes means that water plays a vital role in the formation of these streaks,” said Lujendra Ojha of the Georgia Institute of Technology, lead author of a report published in Nature Geoscience.

And of course, Twitter has been having some fun with the announcement.

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Where to pet a cat

If you have owned or have even been familiar with a pet, then you’d know that every animal has certain spots that they love to have massaged. For the most part, the head is always a safe bet for petting and snuggling and the belly can be downright dangerous. This hilariously helpful guide has some animal petting pro tips for you.
Whether you know canines, felines or fowl, these diagrams should help you out.

Where to pet a dog

Where to pet a rabbit

Where to pet a goldfish

Where to pet a chinchilla

Where to pet a hedgehog

Where to pet a pig

Where to pet a snake

Where to pet a ghost dog

Where to pet a bear

Where to pet a bug

Where to pet a horse

Where to pet a unicorn

Where to pet a wolverine

Where to pet The Wolverine

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