Humanity's oldest and longest-running climate experiment, the International Polar Year (IPY), will run for the fifth time in ...

The polar vortex swept through the midwestern and northeastern United States at the end of January, bringing with it some of the coldest weather that the region had endured in decades. While the cold ...

Our Letter reported that PIN transporters for the plant hormone auxin are initially delivered to the plasma membrane in a non-polar manner and that their polar distribution requires endocytosis.

EVANSTON, Ill. — It was minus 15 degrees here on Wednesday afternoon, near the epicenter of the polar vortex, and school had been canceled for much of the week. We Tried Five Polar-Weather Experiments ...