Both objects are left in an unstable state and does not work on human beings.

"Oh, my God, you did try it on other human beings."

Doing research on human beings, like we were some curiosity?

Such therapies are not yet available for use on human beings.

So far, the only information we have about the effects on human beings has come as the result of accidents.

Bugs, however, need not fear its use again on human beings.

Monitoring and research are therefore needed to establish their impact on human beings.

"The drug has absolutely no noticeable effect on human beings."

I cannot keep an eye on little beings not of my own manufacture.

I suppose he was the one who wanted to see it tried on human beings?