10. Is Earth a sphere?
Because the planet rotates and is more flexible than you might imagine, it bulges at the midsection, creating a sort of pumpkin shape. The bulge was lessening for centuries but now, suddenly, it is growing, a recent study showed. Accelerated melting of Earth�s glaciers is taking the blame for the gain in equatorial girth.

Ray Britt 101 Amazing Facts About The Earth at Space.com