"So remember to look up at the stars and not down at your feet. Try to make sense of what you see and hold on to that childlike wonder about what makes the universe exist."
"If it were only a few degrees, that would be serious, but we could adapt to it. But the danger is the warming process might be unstable and run away. We could end up like Venus, covered in clouds and with the surface temperature of 400 degrees. It could be too late if we wait until the bad effects of warming become obvious. We need action now to reduce emission of carbon dioxide."
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Source: Return of the time lord. Interview With Emma Brockes, www.theguardian.com. September 27, 2005.
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"It is all right to make mistakes; nothing is perfect because with perfection, we would not exist."