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Science & discovery quotes, explained

Scientists and explorers on curiosity, evidence and discovery. Each one is checked against its original source, so you know who really said it before you use it.

≈ Paraphrase · Start here
“God does not play dice with the universe.”
Albert Einstein · 1926
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≈ Paraphrase
“God does not play dice with the universe.”
Albert Einstein · Letter to Max Born · 1926 · Scientist

Einstein rejected the idea that quantum mechanics is fundamentally random. “God” was his way of talking about the laws of nature, not a personal God.

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≈ Paraphrase
“Houston, we have a problem.”
Jack Swigert · Apollo 13 air-to-ground transmission · 1970 · Explorer

The calm radio call from Apollo 13 after an oxygen tank exploded. The real words were “we've had a problem,” said first by Jack Swigert and repeated by Jim Lovell.

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“If I have seen further it is by standing on the shoulders of giants.”
Isaac Newton · Letter to Robert Hooke · 1676 · Scientist

Newton credits earlier scientists for making his discoveries possible. He borrowed the image of dwarfs on giants' shoulders from medieval scholars.

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“Imagination is more important than knowledge.”
Albert Einstein · Interview with George Sylvester Viereck, “What Life Means to Einstein,” The Saturday Evening Post · 1929 · Scientist

Einstein says knowledge is limited to what we already understand, while imagination reaches beyond it. He was describing how he made discoveries.

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“Survival of the fittest.”
Herbert Spencer · The Principles of Biology, Volume I · 1864 · Philosopher

Spencer's phrase for natural selection: organisms best suited to their environment survive and reproduce. “Fittest” means best adapted, not strongest.

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“That's one small step for man, one giant leap for mankind.”
Neil Armstrong · First words on the Moon, Apollo 11 · 1969 · Explorer

Armstrong's first words as he stepped onto the Moon. He said he meant “one small step for a man,” and the missing word has been debated ever since.

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