This most diverse fluid group face some of the greatest barriers humans face.

Since then the genetically-altered humans must face a new phenomenon.

But- like most humans facing anger management issues- Data slipped now and then.

Facing them now were four humans, one male and three female.

Extreme temperatures are not the only obstacles that humans face.

"How many humans would have faced the odds that you did to come here?"

But humans still face a limit on their life-spans.

There's this pesky problem we humans are facing called peak oil.

The few humans who had immunity now face the threat of a comet on a collision course with Earth.

And it is still not known how one animal passes the disease to another, much less if humans face more than a theoretical risk.