As a scientist, my attention became totally focused on global warming some 15 years ago by the elegant and powerful measurements of carbon dioxide trapped in ice cores taken as much as 2 miles deep from the great East Antarctica ice sheet.

Antarctica has this mythic weight. It resides in the collective unconscious of so many people, and it makes this huge impact, just like outer space. It's like going to the moon.

The thing that is most beautiful about Antarctica for me is the light. It's like no other light on Earth, because the air is so free of impurities. You get drugged by it, like when you listen to one of your favorite songs. The light there is a mood-enhancing substance.

I think part of the appeal of Antarctica is experiencing some sort of power, the forces of the natural world.

Antarctica is a very alien environment, and you can't survive here more than minutes if you're not equipped properly and doing the right thing all the time.

The swim at Deception Island was by far the hardest swim I've ever done. Antarctica is a very unforgiving environment. If you don't train properly, you'll die.

Antarctica is otherworldly, like nothing I've ever seen before. Stark, cold, beautiful desolation.

Meteorite hunting is not for wimps. The best places to look are also the coldest and windiest. You need very old ice, and you need wind, lots of it, strong and unrelenting. Antarctica fits the bill.

I write about all manner of things: a guy fighting aliens in the New York State Library, Antarctica, Inca civilization in Peru, the Great Pyramid at Giza, and people often ask me, where do I get these ideas from? They come from reading widely, watching a lot of documentaries, and increasingly ,as I was able to, travelling around the world.