What makes human self-conscious?
Could the human race live on Mars?
Does altitude impact human gas production?
Why do humans sleep?
Why do humans like art?
Before they learn to talk, do babies think in a language like you and me?
How long will Humanity be able to live on the Earth for?
What is the purpose of a human being?
Is there any technological development among indiginous communities (e.g.basarwa of Botswana ) living in their natural habitats?
Why do people age?