These deaths are huge because of the symbolism.

We have been listening for alien signals for decades. It's time we started to watch for signals as well.

NASA's robotic exploration program is being flat-lined.

Everything we pour into the shuttle is an investment in the past.

Resources in space may one day be useful in space. But you're not going to revolutionize the economy on Earth.

Imagine hoisting a sail and being out there in space. It's a beautiful idea, and it conjures up the idea of the great sailing ships and whole notion of exploration.