Explore the World's Largest Underwater Cave January 17, 2018 - The world's longest underwater cave has been discovered near the city of Tulum, on Mexico's Yucatán Peninsula. The new discovery ...

The world's biggest iceberg — which is roughly three times the size of New York City — is "on the move" after being stuck to the ocean floor for 37 years, scientists confirmed Friday.

The Empty Quarter, or Rub' al-Khali in Arabic, is one of the world's largest deserts. Spanning nearly 650,000 square kilometers -- mainly in Saudi Arabia -- it dominates the Arabian Peninsula ...

In the coldest and most remote parts of the world, far from people and cities, glaciers quietly shape our planet. These huge blocks of ice may not make news every day, but they play a big role in ...