4 Thought Experiments That Asked Tough Questions About Reality
No one knows when the first thought experiments were developed, but ancient Greeks first wrote about them. Let these modern ones test your mental mettle.
Source: popularmechanics.com
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What Are Time Reflections?: A 'Holy Grail' in Physics, Explained
To reverse signals in time, we’ve always used a digital approach. Now, a new analog method could dramatically improve wireless communications.
Source: popularmechanics.com
How Do Metal Detectors Work? The Science of Magnetism and Metal
We spoke with metal detector experts to learn more about how they work and how metal detectors can tell the difference between different types of metal.
Source: popularmechanics.com
Why IQ Tests Are Bad Science: Racial, Class Bias in IQ Testing
IQ tests can lead to race and class discrimination, but these measurements are still routinely used to determine people’s educational opportunities.
Source: popularmechanics.com
What Is the Kessler Syndrome? The Looming Threat of Space Debris
A hypothetical scenario known as the “Kessler syndrome” explains why space junk is such a dire problem—and why it’s up to us Earthlings to find a solution.
Source: popularmechanics.com