"Look again at that dot. That's here. That's home. That's us. On it everyone you love, everyone you know, everyone you ever heard of, every human bei… - Carl Sagan

"Consider again that dot [Earth]. That's here. That's home. That's us. On it everyone you love, everyone you know, everyone you ever heard of, every human being who ever was, lived out their lives. The aggregate of our joy and suffering, thousands of confident religions, ideologies, and economic doctrines, every hunter and forager, every hero and coward, every creator and destroyer of civilization, every king and peasant, every young couple in love, every mother and father, hopeful child, inventor and explorer, every teacher of morals, every corrupt politician, every "superstar," every "supreme leader," every saint and sinner in the history of our species lived there - on a mote of dust suspended in a sunbeam."

A little deeper was a fear of falling in love without reservation, of committing herself to someone who might then be snatched from her. Or simply leave her. But if you never really fall in love, you can never really miss it. (She did not dwell on this sentiment, dimly aware that it did not ring quite true.) Also, if she never really fell in love with someone, she could never really betray him, as in her heart of hearts she felt that her mother had betrayed her long-dead father. She still missed him terribly. With Ken it seemed to be different. Or had her expectations been gradually compromised over the years? Unlike many other men she could think of, when challenged or stressed Ken displayed a gentler, more compassionate side. His tendency to compromise and his skill in scientific politics were part of the accoutrements of his job; but underneath she felt she had glimpsed something solid. She respected him for the way he had integrated science into the whole of his life, and for the courageous support for science that he had tried to inculcate into two administrations. They had, as discreetly as possible, been staying together, more or less, in her small apartment at Argus. Their conversations were a joy, with ideas flying back and forth like shuttlecocks. Sometimes they responded to each other’s uncompleted thoughts with almost perfect foreknowledge. He was a considerate and inventive lover. And anyway, she liked his pheromones. She was sometimes amazed at what she was able to do and say in his presence, because of their love. She came to admire him so much that his love for her affected her own self-esteem: She liked herself better because of him. And since he clearly felt the same, there was a kind of infinite regress of love and respect underlying their relationship. At least, that was how she described it to herself. In the presence of so many of her friends, she had felt an undercurrent of loneliness. With Ken, it was gone. She was comfortable describing to h

The universe is not required to be in perfect harmony with human ambition.

When an object impacts the Moon at high speed, it sets the Moon slightly wobbling. Eventually the vibrations die down but not in so short a period as eight hundred years. Such a quivering can be studied by laser reflection techniques. The Apollo astronauts emplaced in several locales on the Moon special mirrors called laser retroreflectors. When a laser beam from Earth strikes the mirror and bounces back, the round-trip travel time can be measured with remarkable precision. This time multiplied by the speed of light gives us the distance to the Moon at that moment to equally remarkable precision. Such measurements, performed over a period of years, reveal the Moon to be librating, or quivering with a period (about three years) and amplitude (about three meters), consistent with the idea that the crater Giordano Bruno was gouged out less than a thousand years ago.