I could hardly blame my primitive ancestors, thousands of years ago on Earth, for believing otherwise.

It's as if we asked our primitive ancestors to protect us from infections without knowing about antibiotics.

We may dress better than our primitive ancestors, but we respond to danger in the same way.

Males of the Race's primitive ancestors had been hunters, carnivores.

Never again will we be made to feel like our primitive ancestors, cowering before forces we can't understand.

In some cases, these do seem to be the more primitive ancestors of forms now living.

Just remember that sun worship among our primitive ancestors was not far off the mark.

This, to Darwin, was proof that we had evolved from our primitive ancestors.

Our primitive ancestors had to suffer extremes of cold and heat.

In this, you retain kinship with your most primitive ancestors.