he sea ice at the North Pole is only a few feet thick. It floats on an ocean that is 14,000 feet deep. And it's cracking under our feet. A global warming expert suggests what to do... Everything you hear -- all the chugging and huffing and banging -- is the ice beneath us. Read about it in my new book THE NORTH POLE WAS HERE. First Chapter free online at www.nytimes.com/learning/globalwarming I'm Andrew Revkin. I cover global warming and other environemtnal issues for The New York Times. Search for my stories on Al Gore's new movie, "An Inconvient Truth," on President Bush's climate policies, and more. My other multimedia work on the Arctic is here: www.nytimes.com/pages/science/sciencerep ort global warming global warming

A short video of the 2007 North Pole Marathon. Participants run a standard marathon of 26.2 miles on the Arctic ice floes and get to stand at the exact Geographic North Pole. It's the northernmost marathon on earth, a member of the Association of International Marathons & Road Races (AIMS) and contained in Guinness World Records. A trip of a lifetime.

Highlights from Andrew C. Revkin's 2003 trip to the North Pole. Scientific studies of the drifting sea ice have since become more difficult.

All summer we've been hearing about how the Polar ice caps are melting. But now-- there is finally proof of how much shrinking has occurred. Take a look at this animation produced by CBS 11 News. As you can see, as the summer progresses, the ice cap shrinks and then finally reaches a point never before seen. The ice actually melts far enough to open part of the Northwest Passage. Scientists from around the world say it's like a spiral effect: as more ice melts, the ice around it becomes weaker and then melts at an even faster rate than before.

National Science Foundation's overview of the North Pole Environmental Observatory.

ritish adventurer says it's a tragedy that global warming enabled him to swim at the Geographic North Pole Wednesday July 25th, 2007 As an environmental campaigner, Lewis Gordon Pugh, a 37-year old British lawyer and endurance swimmer, wanted to highlight the impact of climate change in the high Arctic. On July 15, he jumped into freezing waters at the Geographic North Pole and swam one kilometre in 18 minutes and 50 seconds. The temperature of 28.7 F(-1.8C) reportedly is the coldest water that a human has managed to swim in and survive. Pugh has earned the name "Polar Bear" because of his ability to raise his body temperature. Pugh swam in what is essentially an ice crack, a patch of open sea at the top of the world. Open water is becoming more common during the summer months. Many scientists believe that by 2040, the Arctic could be entirely ice-free during summer. According to the World Wildlife Fund, Arctic air temperatures may rise as much as 12 degrees C in the next 100 years. Pugh's swim was captured by a documentary crew

easons of Change: Evidence of Arctic Warming!

This is the first ever Beach Volley Ball Cup at the North Pole, 90 degrees North. The cup took place April 22nd 2008. Due to all the fuzz about global warming, we expected sun and sandy beaches. Strangly enough, there was more snow and ice there than sand... The clip shows the opening of the first game, and the proud winner, Borge, at the end. The language spoken is mostly norwegian.

Top Gear at the North Pole, with Jeremy Clarkson