I'm always mystified by the day-to-day workings of entities like Twitter that provide framework but not content, but I suppose it could be compared to the U.S. Postal Service, which manages to keep a lot of people employed doing lots of stuff other than writing letters.

Everything rational and sensible abandons me when I try to throw out photographs. Time and time again, I hold one over a wastebasket, and then find it impossible to release my fingers and let the picture drop and disappear.

There are cultures that believe having your photograph taken steals your soul. I don't think there is a stolen soul in a picture, but still - why is it so hard to throw them away?

Sense of smell, of course, is only one of those dog qualities that can't be replicated or improved upon. I've been researching dogs in warfare for my book about 'Rin Tin Tin,' and I've read many accounts of their heroics: carrying messages through battle, alerting troops to enemy planes, and even parachuting behind enemy lines.

One of my favorite activities as a teen-ager was to watch television over the phone with my best friend.

Most fourth graders can't say why Abraham Lincoln is an important historical figure? Wow. This is far more distressing than if the news had been that fourth graders were bad at reciting multiplication tables, because you can, in fact, Google that.

When I heard about the Microsoft Kinect, though, I felt an urgency rising in me. A game you played without touching any machinery? A chance to wave your hands around, Minority-Report style, and move things around on a screen? This sounded like almost too much fun, with gadget-y pizzazz that sounded astonishing.