Most people have never seen the Little Dipper, because most of its stars are too dim to be seen through light-polluted skies.

European mission to Mercury just made its sixth flyby of the planet, revealing stunning close-ups of the permanently shadowed ...

The North Pole has been a subject of fascination for centuries, and early maps of the Arctic provide a glimpse into the mysterious beliefs and imaginations of explorers from the 16th century. One of ...

Ice Cap At Pole Has Partially Melted"In 1996 I was up there," said Lars Wikander, president of Quark Expeditions. "We were a little bit disappointed because when we reached 90 degrees north, there ...