Brits. Karl is walking around the world (including South and Central America) in about 12 years. Think of it as a really long thru-hike. Rosie is running around the world in what looks like 3 years. Consider it a continuous 3 year marathon. We're sitting in our office eating cheetos and drinking mountain dew. What do all these feats have in common? Stamina. Pure, unadulterated stamina folks. None of it is easy folks. Rosie is almost done. Karl has something like 6 years left. And we're on our 4th bag of orange snacks and fluorescent green drink. Here's what Rosie had to say upon her start in '03:

On 2nd October 2003 my 57th birthday, I'm going to set off to run around the world. Making my dream come true and practical necessity, go together. I shall be solo, self supporting and on a very low budget. I couldn¹t afford back up teams, luxury, or flights to different continent and stages across wide oceans.

My dearest wish anyway, is just to do a complete circle of the earth, planned to keep me on as much land mass as possible, This is also the coldest, hardest, most fascinating way, and includes almost 7,000 miles of Russia and Siberia. I shall go across Europe through Holland, Germany, Poland and Moscow, before hitting the Trans Siberian Railway route. Then go on to the Bering Straits, Alaska, America, Canada, Greenland, Iceland, Ireland, Scotland and England, before returning to the start and finishing line at Tenby, my home in Wales. It will be my world voyage on two feet.

If you're in Chicago in October, she'll be running the marathon so stop by and say hi.