If you ask people what shape our planet is, most will answer that Earth is round (although a few might try to convince you it's actually flat). Going as far back as ancient Greece, humanity has ...

Our planet isn't a perfect sphere but an oblate spheroid, bulging at the Equator due to rotation. This subtle flattening, though unnoticeable daily, significantly impacts GPS, climate studies, and ...

Our universe appears flat—but this observation still leaves plenty of options for its true shape. In fact, our cosmos could resemble a donut What shape is the universe? This question is far more ...