People think the earth is going to die and they have to save it. That's ridiculous. If you rid the earth of flowering plants, people would die, period. But the earth was without flowering plants for almost all of its history.

There is no scientific reason to think that we, even with space travel, are going to survive as a species for ever, certainly not by biting off the hand that feeds us, which is exactly what we are doing.

People think the earth is going to die and they have to save it. That's ridiculous. If you rid the earth of flowering plants, people would die, period. But the earth was without flowering plants for almost all of its history.

Despite our very recent appearance on the planet, humanity combines arrogance with increasing material demands, even as we become more numerous. Our toughness is a delusion. Have we the intelligence and discipline to vigilantly guard against our tendency to grow without limit?

All living beings, not just animals, but plants and microorganisms, perceive. To survive, an organic being must perceive - it must seek, or at least recognize, food and avoid environmental danger.