If you start any large theory, such as quantum mechanics, plate tectonics, evolution, it takes about 40 years for mainstream science to come around. Gaia has been going for only 30 years or so.

The big threat to the planet is people: there are too many, doing too well economically and burning too much oil.

The Earth's population will be culled from today's 6.6 billion to as few as 500 million, with most of the survivors living in the far latitudes - Canada, Iceland, Scandinavia, the Arctic Basin.

I've got personal views on the '60s. You can't have freedom without paying the price for it.

By the end of this century, climate change will reduce the human population to a few breeding pairs surviving near the Arctic.

Florida will be gone altogether, the whole damned place, in not too long.

Nowadays if you're dependent on a grant - and 99% of them are - you can't make mistakes as you won't get another one if you do.