2/3rds water. 1/4 land. The rest is the Shadowlands; never go there, Simba. Earth is the only planet in the solar system where you can get babyback ribs. The circumference of earth is almost 25,000 miles; a guy named Eratosthenes figured that out in 250 BC with a stick, a well, and some camels. (Honest.) … Continue reading Earth Facts For Earth Day