He combined human genetic material with that of several animal species.

It was always a risk, using human material like these.

Why were human materials and building methods so inadequate to resist the forces of the world?

As predicted, except for the human skeletal material, all of these things were found.

Another adult asked: "You still think there's a good supply of human genetic material on board?"

We haven't been able to get any human genetic material from the Ship to work with.

"He had less to work with in terms of human material."

They must have had plans of their own as to the available human material.

I say let's pump human material into every animal on the planet.

Contamination remains a major problem when working on ancient human material.