Learn how to convert points between rectangular and polar. Rectangular points measure the horizontal and vertical distance away from the origin whereas polar coordinates measure the direct distance ...

Since its inception in 2017, the Polar Institute has become a premier forum for discussion and policy analysis of Arctic and Antarctic issues, and is known in Washington, DC and elsewhere as the ...

Seven of the eight Arctic nations are members of NATO yet collectively, they trail Russia's ice-breaker capacity. This was even before adding in the icebreakers China has built as it proclaims itself ...

Creative Commons (CC): This is a Creative Commons license. Attribution (BY): Credit must be given to the creator. Delivery and focusing of radiation requires a variety of optical elements such as ...