He told students it was time for them to learn what it means to be a human being on Earth at a time when every living system was failing.

VOA: special.2009.06.05

It's important for you to feel in your life that you're someone, that you're a human being.

VOA: standard.2009.11.25

"For example." "we cannot determine if a drug is going to work in a human being, and be safe in a human being by testing that drug in cell culture models.

VOA: standard.2010.02.16