In the current fashionable denigration of technology, it is easy to forget that nuclear fission is a natural process. If something as intricate as li… - James Lovelock

The climate and the chemical properties of the Earth now and throughout its history seem always to have been optimal for life. For this to have happened by chance is as unlikely as to survive unscathed a drive blindfold through rush hour traffic.

Neither Lynn Margulis nor I have ever proposed a teleological hypothesis. Nowhere in our writing do we express the idea that planetary self-regulation is purposeful, or involves planetary foresight or planning by the biota. … Yet we met persistent, almost dogmatic, criticism that our hypothesis is teleological.

One thing being a scientist has taught me is that you can never be certain about anything. You never know the truth. You can only approach it and hope you get a bit nearer to it each time. You iterate towards the truth. You don't know it.