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Liquid water exists on the surface of Mars during the planet’s warmer seasons, according to new research published in Nature Geosciences . This revelation comes from new spectral data gathered by NASA’s Mars Reconnaissance Orbiter (MRO), a spacecraft that studies the planet from orbit. The orbiter analyzed the chemistry of weird dark streaks that have been known to appear and disappear seasonally on the Martian surface. The analysis confirms that these streaks are formed by briny — or salty — water flowing downhill on Mars.

NASA has advertised these findings as the solution to a major Mars mystery: does the Red Planet truly have liquid water on its surface? Researchers have known that water exists in ice form on Mars, but it’s never been confirmed if water can remain in a liquid state. The space agency is claiming that we now have that answer.

This isn’t the first study to suggest liquid water is present in some form on Mars. Scientists have theorized for years that Mars was once home to a large ocean more than 4 billion years ago. And recent findings from the Mars Curiosity rover suggest that liquid water exists just underneath the Martian surface. The discovery of water on Mars has almost become a joke among planetary scientists. Alfred McEwen, a planetary geologist at Planetary Image Research Laboratory who also worked on this research, wrote in Scientific American that the studies have become extremely commonplace: “Congratulations — you’ve discovered water on Mars for the 1,000th time!” he joked.

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https://youtube.com/watch?v=D0DbgNju2wE

Say hello to the drones of the future. They’re gorgeous, sophisticated, and they’ve got high-energy lasers.

The body of the drone will look familiar to those who are familiar with current drones as those lasers will be riding shotgun–quite literally–on General Atomics Aeronautical Systems’s Avenger. The company, also responsible for the Reaper, is embarking on a privately-funded study to figure out how to incorporate 150-kilowatt solid-state laser onto the drone, according to an interview with Defenseone. Depending on the success of the study, the company is hoping to have the laser drones up and running by 2017.

Basically, the funding for this program is enough to figure out if it’s possible, and if so, how to create a laser that’s compatible with the Avenger.

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From biohacking to robotics, they’re all on the lookout for the holy grail of offering amputees a fully functional replacement limb. But how awesome would it be if you could regrow your own arm in the same manner as a spider? A rat forelimb entirely created form living cells.

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Sabine Dziemian, a postgraduate in Faisal’s research group, says, “If I want to draw a straight line, I look at the start point and the end point, and the robot moves the brush across that line.”

Blinking three times puts the robot in color selection mode, in which it moves the brush over to a variety of pre-dispensed colors. At that point, the user only needs to look at the color he or she wants to use next, and the arm applies the color to the brush.

“Since time immemorial, human imagination has sparked the idea of having additional arms,” says Faisal. He invokes the multiarmed Hindu goddess Shiva, often a symbol of transformation, to suggest we might one day “do the dishes while taking a phone call or [holding] your baby and [preparing] the food at the same time, because you have just that extra pair of hands attached to you.”

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According to scientists photons can travel through time. They already have simulated directing quantum light particles to the past for the first time in the history. University of Queensland scientists learned that a simulation of two wormhole-travelling photons might interrelate; signifying hopping through time is conceivable at smallest scales. Their study might help to comprehend how time-travel could be conceivable in the quantum realm. PhD student Martin Ringbauer spoke to The Speaker: “For the first, ‘photon one’ would travel through a wormhole into the past and interact with its older version. In the second, ‘photon two’ travels through normal space-time but interacts with a photon that is stuck in a time-travelling loop through a wormhole, known as a closed timelike curve (CTC).”

Tim Ralph, UQ Physics Professor, said: “We used single photons to do this, but the time-travel was simulated by using a second photon to play the part of the past incarnation of the time travelling photon.”

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Virtual reality headsets can trick our eyes and ears into believing we’re someplace else. Fooling the rest of the body is a little trickier though. Companies have tried spinning chairs and omnidirectional treadmills, but nothing comes close to the “Cable Robot Simulator” developed at the Max Planck Institute for Biological Cybernetics. The player wears a wireless VR headset inside a carbon fibre cage, which is then suspended in mid-air and thrown around the room using eight steel cables. The exposed pod is able to tilt, bank and move with an acceleration of up to 1.5g in response to the VR experience. Researchers have shown off some basic flight and racing simulations, but we’re already imagining how it could be used in our favorite video games. A dogfight in Star Wars: Battlefront Tearing around corners in F-Zero GX The possibilities are endless. It’s still very much a prototype, and hardly suitable for home use, but we’re desperate to have a go ourselves.

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