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Over a century ago, Einstein wrote his theories of special relativity and general relativity. Within those theories, he predicted that, as an object moves faster, it slightly contracts in length. However, 50 years later Penrose and Terrell predicted that what one would see is instead that the object is rotated. In a recent experiment, physicists proved that this Penrose-Terrell effect is actually real. Let’s take a look.
Paper: https://www.nature.com/articles/s42005-025-02003-6
Correction to what I say: The object (frame) they used is obviously not a cube (as you can see in the photo), it has dimensions of 1 × 1 × 0.6 m.
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