So how could an old school draftsman figure out the area of complex shapes? [Chris Staecker] introduces us to the polar planimeter, a measuring tool created specifically for the purpose and ...

The sucrose molecule has many oxygen-hydrogen (O–H) bonds which are polar. The charge-density model shows the positive areas near the hydrogen atom as blue and the negative area near the oxygen atom ...

A polar vortex is a large area of low pressure and cold air that surrounds the Earth’s poles, according to the National Weather Service. Polar vortexes typically develop in September and ...