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Comet 3I/ATLAS reaches its closest point to Earth tonight: How to see it in the sky and online

Comet 3I/ATLAS, the third interstellar object ever detected, will swing closest to Earth overnight from Thursday to Friday ...
Scientific American

Two Möbius Strips Combine to Create a Bizarre Object That Only Exists in 4D

In geometry, there are surfaces that do without an inside or outside—and some need at least four dimensions to exist ...