It's been a fascinating and exhausting week on the Traveling Geeks tour. The best part has been our visit to Cambridge, the innovation capital of England. I've got lots of material to post from our trip, all this week, so please check back regularly.

One highlight of the trip was on Saturday night. My son Matt and I were looking for a place to eat. We just happened to choose one of the favorite spots for Professor Stephen Hawking. It was a huge honor to be in the same room as Britain's top scientist.

The photo shows his two blond assistants helping him with his high-tech wheelchair.