I thought I would start with the logo. What's missing here, of course, is the North Polar ice cap.

But after three trips to Antarctica, I decided that it might be nicer to work in warmer water.

We're having a weirdly warm Christmas in Toronto (we had Arctic temperatures this time last year!).

Greenland remains. Twenty eight years ago, this is what the polar ice cap the North Polar ice cap looked like at the end of the summer, at the fall equinox.

The North Polar ice cap is the same size geographically doesn't look quite the same size but it is exactly the same size as the United States, minus an area roughly equal to the state of Arizona.

This is, obviously, that famous view now of the Arctic, which is likely to be gone at this point in the next three or four or five years. Very, very, very scary.

Extreme runner Ray Zahab shares an enthusiastic account of his record breaking trek on foot to the South Pole a 33 day sprint through the snow.

At the Andøya Rocket Range, scientific rockets are launched and the international Arctic Lidar Observatory for Middle Atmosphere Research (ALOMAR) facility uses light detection and ranging (lidars) to study the middle and upper atmosphere.

The table does not include the numerous whaling voyages that took place during this period, or sub Antarctic expeditions such as that of Carl Chun in 1898 99, which did not penetrate the Antarctic circle.