Mathematicians are “reinventing the wheel” by giving it a new shape. Their newly imagined wheel looks like a many-dimensional guitar pick, and it could theoretically roll in ways beyond our ...

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 ...

Is the universe infinite, Aristotle asked in 350 BCE, “or is this an impossibility? The decision … is … all-important to our search for the truth.” The Greek ...

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