Let's make hay while it lasts.

Our future is like that of the passengers on a small pleasure boat sailing quietly above the Niagara Falls, not knowing that the engines are about to fail.

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

We are the intelligent elite among animal life on earth and whatever our mistakes, [Earth] needs us. This may seem an odd statement after all that I have said about the way 20th century humans became almost a planetary disease organism. But it has taken [Earth] 2.5 billion years to evolve an animal that can think and communicate its thoughts. If we become extinct she has little chance of evolving another.

NASA will send up a big sun shade that will be in orbit between the earth and sun and deflect 2 or 3 percent of the sunshine back into space. It would be cheaper than the international space station.

I suspect any worries about genetic engineering may be unnecessary. Genetic mutations have always happened naturally, anyway.

There is little evidence that our individual intelligence has improved through recorded history.