It's hard to believe Pale Blue Dot has been with me for over 8 years, it is also the 8 year during which I was transformed by the intelligence and wisdom of Dr. Sagan, and of course, his other works Cosmos and The Demon Haunted World become my favorites.
Pale Blue Dot reads like the sequel to Cosmos, but with more focus on our Solar System, and it shows a much more wide perspective than Cosmos, with a theme so haunting and thought-provoking that makes me really think something important even without that famous picture captured billions miles away.
Newspapers, TV coverages is often inundated by slogans like "We only have one Earth", "Save the Earth", we are so familiar with that. But unfortunately, most of us do not quite understand what's truly behind that. And Dr. Sagan tells us all, we are here, in that point of pale light, a lonely speck in the great enveloping cosmic dark. He starts the book with this humbling revelation.
But with its insignificance, it's also the respiratory of all our potential. We touched moon with the rockets not yet designed when the project started, we explored the whole Planet in the system, our spacecraft hit the comet billions miles away, we healed our Ozone Layer, just as Dr. Sagan says, we are still capable of greatness if we do not destroy ourselves first!(in fact, if we can not handle our fallibility, our specie is hopeless)
Pale Blue Dot is the history of human beings in terms of exploration, the very nature of us. Dr. Sagan perhaps gives hitherto the most precise definition of our species in the book, it's about our inclination toward mistakes, and more importantly, about our potential. We became the first specie on Earth which has the ability to wipe itself out, but don't forget, we are also the first to be able to leave Earth, to explore our future in the vast cosmos, to handle space mountains. That is, according to Dr. Sagan, what we should learn from that blue pixel in the sun beam.
Dr. Sagan passed away in 1996, before I started to read this book. When we confront difficulties, when we are in trouble, I always recall the final chapter of Cosmos, Who speaks for Earth. If not us, who will? As Dr. Sagan says in Pale Blue Dot, "there is no hint that help will come from elsewhere to save us from ourselves". And still I see that we are making big progress, with the hard work of Al Gore, Bill Gates and others. Everytime I think of that, I can feel that we do learn something from Dr. Sagan, and, as Ann Druyan wrote in the epilogue of Billions and Billions, "They allow me to feel.........that Carl lives."
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