No one can deny the excitement of visiting another world.

Present annual world energy consumption is about equal to the annihilation energy of 4 tons of matter.

I'm on the sidelines going through my normal routine, stretching, staying loose. I didn't notice the noise or the excitement. My focus was like tunnel vision.

It would be a pity if, frustrated by the price of travel, we elected to become a society that never made contact, that never gave SETI a fair chance.

In the past, on Earth, it has largely been to exploit foreign resources and to expand the domestic territory.

Years of science fiction have produced a mindset that it is human destiny to expand from Earth, to the Moon, to Mars, to the stars.