What happens when you break sound barrier

In the early days of air travel, planes faced a problem. The tips of their propellers were going faster than the speed of sound, and there was a risk that they could become unstable and rip apart in the air. That left engineers with a question: was it possible for a plane to fly at … Continue reading What happens when you break sound barrier

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This can turn any energy into electricity 

Scientists have discovered a material that might be science's biggest overachiever. This material, which is a type of a mineral called perovskite, can turn sunlight, heat, and movement into electricity—all at the same time. What a show-off. Cross section of the cell. These were invented in 2009, and since then have been seen as the … Continue reading This can turn any energy into electricity