A system expected to stall over Florida late this week could spell trouble for your Fourth of July outdoor plans in Fort ...

In the atmospheric layer above it, about 10 to 30 miles up, is the stratospheric polar vortex, where every winter a sunlight-starved Arctic spins up a mass of cold air that, ultimately, dissipates ...

CALIFORNIA — The four-person civilian Fram2 mission returned home in a splash down off the coast of California on Friday after being the first humans to orbit Earth's polar regions. Riding in ...

KENNEDY SPACE CENTER — The Fram2 mission will be the first human spaceflight around Earth’s polar regions, as the commander shares with Spectrum News what this new adventure means to him.

Here, the authors describe genetically engineering the Pseudomonas genome by two-step allelic exchange. Suicide vector-encoded alleles are used to generate mutations by homologous recombination at ...

Get the latest news headlines and top stories from NBCNews.com. Find videos and news articles on the latest stories in the US.