"We might even have a common human ancestor somewhere way back."

It means you share a common ancestor with that person.

We go back through the tree, to every common ancestor that you and I share.

They are also all related to one another through the relations of common ancestors.

It was as if I had designed them with a common ancestor in mind.

In 2008, new research suggested that people with blue eyes have a single common ancestor.

I don't think it is likely that we shared any common ancestors.

They are probably similar to the common ancestor of the two groups.

The shared common ancestor may have lived about 2,000 years ago or so.

We have common ancestors, so I feel a big connection with her and to that sound.