Around 2,500 years ago humankind began to recognize that our planet is round—although a few “flat Earth” supporters still deny this today. The shape of our universe is not clear, however. Previous studies have suggested that the cosmos probably has a fairly simple shape, such as the three-dimensional equivalent of a spherical surface or a plane. But this view may be wrong, according to cosmologists from the Collaboration for Observations, Models and Predictions of Anomalies and Cosmic Topology (COMPACT). In a paper published in April 2024, they found that the shape of the universe could be significantly more complex than previously assumed.
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