A two-and-a-half-year-old is pretty experienced at making a mess, anyway.

My father was a very good Boy Scout. He was very skilled with knots, and he showed me how to tie a bow tie.

In another couple centuries I'm sure that worldview won't even exist. There's no evidence for it.

NASA is an engine of innovation and inspiration as well as the world's premier space exploration agency, and we are well served by politicians working to keep it that way, instead of turning it into a mere jobs program, or worse, cutting its budget.

If NASA is to reach beyond the Moon and someday reach Mars, it must be relieved of the burden of launching people and cargo to low earth orbit. To do that, we must invest more in commercial spaceflight.

A two-and-a-half-year-old is pretty experienced at making a mess, anyway.

Bicycling is a big part of the future. It has to be. There's something wrong with a society that drives a car to work out in a gym.