She'd hoped to keep very real humans from getting hurt.

At this pressure, that was just barely enough to keep normal humans going.

That means keeping humans off it, out of space.

They certainly knew how to keep errant humans in line!

Henry takes great care to keep other humans, including his own parents, from learning about the Littles.

How can he keep humans from harm, whether he knows it or not?

They've probably been spotted many times over the centuries, but they always used mind control to keep humans from remembering what they'd seen.

My folks told me it would help keep you old humans from getting suspicious.

I tell you, there's something to be said for keeping humans out of reservations.

If you refuse, you'll die for nothing, because we can always devise some deception which will keep humans away from here.