From the Great Blizzard of 1888 to the sinking of the Titanic, see how NAO may have affected history. Then look at how it may affect the future.

Qori Kalis is the largest outlet glacier of Peru's Quelccaya ice cap. See firsthand how it (like all tropical glacier ice) is melting because of global warming.

Mapping one-quarter of the heavens in three dimensions — that’s the ambitious mission for the Sloan telescope at the Apache Point Observatory in the Sacramento Mountains of New Mexico. Find out what astronomers have discovered so far.

Yellowstone National Park lies above a stationary hotspot deep in Earth's mantle. See how previous volcanic eruptions of the hotspot have left a trail of calderas that ends, at the moment, with Yellowstone.

Vietnam harbors an astonishing range of habitats, from rain forests and dry forests to mangroves and coral reefs. It's also home to an unusually rich array of plants and animals. Find out why.

Millions of gallons of water flow through New York City’s water system each day. Where does it all come from? And where does it all go? Take an interactive journey to find out.

Focus on the best books about astronomy, astrophysics, light, telescopes, digital imaging, and the 3-D universe with this list of recommended titles, suitable for older students and adults.

Considered the world's most intriguing genius, Einstein has inspired hundreds of writings. Here's a short list of some of the most enlightening looks at his life and ideas, including some he penned.

Whales abandoned dry land over 50 million years ago to recolonize the sea. And they look nothing like the ancestors they left behind. Take a closer look at their extraordinary transition.