Earth’s rotation feels steady, but beneath that illusion of constancy lies a subtle truth: the planet’s spin is shifting. The axis around which Earth rotates isn’t fixed. It wanders, sways, and drifts. This movement, called polar motion,…
Earth’s rotation feels steady, but beneath that illusion of constancy lies a subtle truth: the planet’s spin is shifting. The axis around which Earth rotates isn’t fixed. It wanders, sways, and drifts. This movement, called polar motion,…