The concept of a fourth dimension is so elusive and mysterious that many of us find it almost impossible to comprehend. But ...

"What we're seeing is things like extreme heat waves, levels of temperature change in Antarctica we've never seen before and didn't expect to see. We're seeing the ice retreating at a rate we'd never ...

Once the poster child for global environmental disaster, the ozone hole over Antarctica is now steadily shrinking, and scientists say it’s proof that international action works. Thanks to decades of ...

A team of scientists captured the sharpest-ever view of the sun's outer layer using a telescope in California. NBC News' Gadi Schwartz talks to professor at New Jersey Institute of Technology Philip ...