How We Know Black Holes Exist

This video is about the astronomical amount of astronomical evidence for black holes, ranging from x-ray binaries with accretion disks, supermassive infrared-radiating galactic nuclei black holes, orbital characteristics of high mass binaries, and direct gravitational wave detection of inspiraling merging black hole binaries with LIGO.

10 Real Places On Earth That Seem Scientifically Impossible

There is a certain enjoyment in being completely confused. It’s a reason some of us travel: to be baffled, to be surprised, to be shocked. To look around at our foreign surroundings and have absolutely no idea what’s going on. This weirdness that you notice while on the road comes in different guises. It can be quirks of culture, or it can be unique attractions; it can be natural, or it can be man-made; in some cases it can be a complete mystery to even those who claim it as their own. These places are really weird – and they’re definitely worth seeing for yourself.

Top 10 Future Technology That’s Here Right Now

Every year there seems to be a new innovation, something that makes life easier for some and more complicated for the less technologically inclined. For this installment, we’re looking to the future of technology at ten anticipated concepts that could actually do us some good – or, at the very least, sound really cool to talk about.

Low-cost robotic arms developed by Chinese scientists ($145)

Low-cost robotic arms developed by Chinese scientists

Newly-developed robotic hands by Chinese researchers were made public at a sci-tech exhibition on Tuesday in East China’s Anhui province.

Low-cost robotic arms developed by Chinese scientists . Robotic arms are very useful in the industry and a very favorite project of engineering students. 
Moreover, The researchers of University of Science and Technology of China (USTC) made a robotic hand which has advanced grasping abilities compared to those available in market. 
In addition, they have flexible movements like they can pick pieces of paper, glazed bowls and fluffy cakes and place them at desired places.
With the hands, robots can grasp and place different objects steadily and accurately after judging the shape and size of the item.
Similarly, the existing robotic arms in China can hardly conduct such movements and are very expensive.
Whereas, this robotic hand costs no more than 1,000 yuan (about 145 US dollars) said Chen Xiaoping, director of the Robotics Laboratory at USTC, adding that this gives them an advantage for wider application.
 
 

 

 

 

 

Your Hard Drive May Be Listening, Research says

Your Hard Drive May Be Listening

The read head in a hard drive vibrates in the presence of sound waves, which could allow a remote attacker to listen to anyone nearby.

Your Hard Drive May Be Listening . There are many ways in which our technology is exposed to attacks based on Physics rather than on software. University of Michigan computer scientist Kevin Fu and his colleagues have found several unsettling ways that sound waves and other sources of interference could be used to commandeer household devices and personal electronics. Kevin Fu reported his latest scary findings: your computer hard drive could—without you knowing it—be used to record your voice, at American Association for the Advancement of Science (AAAS) conference in Washington.
Sensors are very important to us and there readings are almost universally accepted without question like thermometers in freezers for human eggs, accelerometers in airbags etc. but Fu and his colleagues have shown that using carefully crafted electromagnetic and acoustic interference, an attacker can take control of sensor outputs.
David Ehrenstein of Physics gave an example that the team has shown that appropriate electromagnetic waves can cause a thermocouple—a sensor that produces a voltage to represent the temperature—to be read as showing −1847−1847 degrees Fahrenheit when it was actually at room temperature. They similarly caused the voltage sensor in a pacemaker to provide inaccurate signals.
The team’s latest trick is to turn a hard drive into a microphone. They tapped into the feedback system that helps control the position of the read head above the magnetic disk. When the head is buffeted by sound waves, the vibrations are reflected in the voltage signal produced by the drive’s position sensors. By reading this signal, Fu and his colleagues were able to make high-quality recordings of people speaking near the drive, reported by Physics
The team is developing defenses against every attack they developed but Fu is concerned and worries about the security sensor dependent systems. “We just blindly trust these sensors,” he says. The industry needs to take these threats more seriously, and “computer scientists need to spend more time in physics labs.”
 Also Read: Low-cost robotic arms developed by Chinese scientists ($145)

Adnan Sami is the only Pakistani product that we are ashamed, Shaan Shahid.

Adnan Sami is the only Pakistani product that we are ashamed

Adnan Sami, an Indian singer has become center of social media outpour after he twitted about Pulwama attack and admired Nerendra Modi for attacking Pakistan which escalated the online rage between two countries and made way for heavy trolling for him.

Adnan Sami is the only Pakistani product that we are ashamed ,Shann Shahid said.
However, a new trend centered around the singer called #MajorAdnanSami is the most popular and Pakistani actor Shann Shahid also joined in.
“Adnan Sami is not a Pakistani neither an agent as intelligence agents have honour he is the only Pakistani product that we are ashamed of. Keep him he is yours,” Shan stated on Twitter.