The standoff at Standing Rock was one of several pipeline battles that reached turning points this year. What's behind them?
Hubble shows signs that the moon is spitting water from a subsurface ocean, raising excitement for a planned mission to the frozen world.
New findings about the properties of fossil amber could shed light on glass and glass-like materials.
Earth majestically rises over the moon’s dark side and the International Space Station spots a desert megacity.
Shifting sands reveal a Civil War shipwreck and bring to light stories of the bravery shown by her crew as she went down.
With some rubber gloves and test tubes, scientists can learn a lot about hormone levels and the well-being of animals.
Poachers are wiping away a rare subspecies of giraffe found in central Africa. Exclusive video shows the aftermath of recent killings.
Thirty years after the disaster, a giant structure will replace the crumbling Soviet-era sarcophagus built to contain the site's radiation.
Temperatures may dip to nearly negative 40 degrees Fahrenheit in parts of the country this week. Here’s why it’s so freakishly cold.
Playing in the snow is a universal, time-honored pleasure that takes many forms around the world.