Earth is a little-known planet. We have little appreciation for what we're doing. ... We are flying blind,

Darwin's dice have rolled badly for Earth. The human species is, in a word, an environmental abnormality. Perhaps a law of evolution is that intelligence usually extinguishes itself.

Human activity equals a decline of the rest of life on earth,

Everybody should have an equal chance -- but they shouldn't have a flying start.

It was a great culturally enriching experience. I know that the students went away with a better appreciation of Africa.

Ants have the most complicated social organization on earth next to humans.