How would a brain machine interface work? A brain machine interface would work by reading the brain’s electrical signals and converting them into a signal that a machine can use. They could be worn on the head or implanted in the brain. At its simplest level, the brain machine interface is just reading the electricity […]
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How does an earthquake resistant building work? Architects and engineers can make buildings that resist earthquakes by reducing how much the buildings move horizontally when an earthquake occurs. Earthquakes are an unavoidable natural disaster. They can be caused by volcanic activity, collapsing mountains, or they can be caused by the motion of tectonic plates. When
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How do driverless cars navigate a city? Driverless cars use a whole mix of software and sensors to navigate through a city. They use Lidar, radar, cameras, and self-learning algorithms. Driverless cars are becoming more common these days, but they always have to have a driver paying attention at the wheel in case something goes
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Why is the AK-47 so good? AK-47s are so good because they are easy to use, cheap to make, reliable, and they can function in extremely harsh conditions. The AK-47 is the most popular gun ever made. The AK-47 was designed in 1945, finalized in 1947 (hence its name), and went into production in 1948.
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How can a person control a bionic limb? There are generally four ways a person can control a bionic limb. They can use a special harness that can open or close hooks. They can have sensors that read electrical signals through the skin. They can attach directly to the nerves. They can have sensors that
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How does a lie detector work? Lie detectors work by recording breathing rate, pulse, blood pressure, muscular activity, and perspiration to look for any changes. They are not admissible in court because they don’t always work. The modern lie detector (polygraph) was created in 1945, but there were many steps along the way. The first
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Was the transition from silent movies to talkies difficult? Yes, the transition from silent movies to talkies was difficult, not just technologically, but also for the actors. Movies began to appear alongside the invention of photography. Early photographs took hours to take, but once it became possible to take photographs instantly, movies were the next
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What is pirate radio? A pirate radio station is a radio station that broadcasts a signal in an area controlled by a government without having a license from that government. Pirate radio stations began in the 1940s, but they probably hit their peak in the 1960s. They brought music and attitudes to the multitudes that
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Why does an oxyacetylene torch get so hot? An oxyacetylene torch gets so hot because the particles in acetylene hold an enormous amount of energy that they release when they are exposed to oxygen. Most of us will never have used an oxyacetylene torch. They are used by metal workers to weld or to cut
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How can we 3D print organs? Organs can be 3D printed using an ink made of the patient’s own cells that are laid on a scaffold. One of the problems we have as humans is that our organs sometimes fail. There are many reasons for this, from disease to accidents. Some organs we can live
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