A remarkable film from the National Geographic's daring EXPLORER series, ICELAND RIVER CHALLENGE follows twelve modern-day pioneers on a treacherous...

What is weakening Earth’s invisible shield? Magnets have the power to attract and repel—sometimes on a massive scale. The Earth’s molten...

Stephanie collapses in a pool of blood while on a school skiing trip. A doctor discovers that the blood is the after-effects of giving birth. Soon...