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.

Antimatter is not a source of energy for us, it's a method of storing energy, compact but inefficient.

Above all, I would not expect a wise race, at great expense, to set loose an army of self-replicating robots.

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

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.

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.