Protons give an atom its identity, electrons its personality.
Bill BrysonStichwörter: quantum-physics atoms
It is a slightly arresting notion that if you were to pick yourself apart with tweezers, one atom at a time, you would produce a mound of fine atomic dust, none of which had ever been alive but all of which had once been you.
Bill BrysonStichwörter: science self-awareness atoms
It was quite the most incredible event that has ever happened to me in my life. It was almost as incredible as if you fired a 15-inch shell at a piece of tissue paper and it came back and hit you.
[Recalling in 1936 the discovery of the nucleus in 1909, when some alpha particles were observed instead of travelling through a very thin gold foil were seen to rebound backward, as if striking something much more massive than the particles themselves. He won the Nobel Prize in Chemistry for this discovery.]
Stichwörter: science physics discovery nobel-prize atoms nobel-laureate atomic-science incredible nuclear-physics
After a while the Senior Wrangler said, "Do you know, I read the other day that every atom in your body is changed every seven years? New ones keep getting attached and old ones keep on dropping off. It goes on all the time. Marvelous, really."
The Senior Wrangler could do to a conversation what it takes quite thick treacle to do to the pedals of a precision watch.
"Yes? What happens to the old ones?" said Ridcully, interested despite himself.
"Dunno. They just float around in the air, I suppose, until they get attached to someone else."
The Archchancellor looked affronted.
"What, even wizards?"
"Oh, yes. Everyone. It's part of the miracle of existence."
"Is it? Sounds like bad hygiene to me," said the Archchancellor. "I suppose there's no way of stopping it?"
"I shouldn't think so," said the Senior Wrangler, doubtfully. "I don't think you're supposed to stop miracles of existence."
"But that means everythin' is made up of everythin' else," said Ridcully.
"Yes. Isn't it amazing?
Stichwörter: wizards atoms hygiene
The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, the carbon in our apple pies were made in the interiors of collapsing stars. We are made of starstuff.
Carl SaganStichwörter: stars sense-of-wonder atoms dna cosmos
If we assume that the last breath of, say, Julius Caesar has by now become thoroughly scattered through the atmosphere, then the chances are that each of us inhales one molecule of it with every breath we take.
James Hopwood JeansStichwörter: breath chance julius-caesar caesar atmosphere atoms molecules
The knowledge that the atoms that comprise life on earth - the atoms that make up the human body, are traceable to the crucibles that cooked light elements into heavy elements in their core under extreme temperatures and pressures. These stars- the high mass ones among them- went unstable in their later years- they collapsed and then exploded- scattering their enriched guts across the galaxy- guts made of carbon, nitrogen, oxygen, and all the fundamental ingredients of life itself. These ingredients become part of gas clouds that condense, collapse, form the next generation of solar systems- stars with orbiting planets. And those planets now have the ingredients for life itself. So that when I look up at the night sky, and I know that yes we are part of this universe, we are in this universe, but perhaps more important than both of those facts is that the universe is in us. When I reflect on that fact, I look up- many people feel small, cause their small and the universe is big. But I feel big because my atoms came from those stars.
Neil deGrasse TysonStichwörter: science life astronomy atoms
It was like bouncing tennis balls off a mystery piece of furniture and deducing, from the direction in which the balls ricocheted, whether it was a chair or a table or a Welsh dresser.
Marcus ChownStichwörter: physics hilarious atoms quantum-theory
The beauty of a living thing is not the atoms that go into it, but the way those atoms are put together.
Carl SaganStichwörter: science beauty philosophy universe atoms cosmos
[Think] of an experience from your childhood. Something you remember clearly, something you can see, feel, maybe even smell, as if you were really there. After all you really were there at the time, weren't you? How else could you remember it? But here is the bombshell: you weren't there. Not a single atom that is in your body today was there when that event took place. Every bit of you has been replaced many times over (which is why you eat, of course). You are not even the same shape as you were then. The point is that you are like a cloud: something that persists over long periods, while simultaneously being in flux. Matter flows from place to place and momentarily comes together to be you. Whatever you are, therefore, you are not the stuff of which you are made. If that does not make the hair stand up on the back of your neck, read it again until it does, because it is important.
Steve GrandStichwörter: memories atoms matter flux
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