Should a cooperative venture go well, many American scientists hope it would lead to an international human expedition by about 2015.

Yet now it is the simultaneous object of two human expeditions.

More than anything else it was what had drawn the human expeditions to Arachna.

The second half of the fourth season centers around the secret preparations for the first human expedition to Titan.

Entire human expeditions had been lost within the mountainous terrain at one time or another.

The city holds many secrets and technology far in advance of that mastered by the human expedition.

I took part in a human expedition during the Starflyer War.

The president called for a return to the moon and for a human expedition to Mars.

My novel Mars is a very realistic look at the first human expedition to the red planet.

Then he'd have to destroy the human expedition and proceed to K2:in on his own.