"If we want to go to Mars, it will be very, very difficult, it will cost a great deal of money, and it may cost human lives. But I know now that if we decide to do it, we can."
— Space exploration

January 1, 1970

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Added on April 10, 2026
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TechnologyOuter space
Original Language: English

Sources

Scott Kelly, from his book, Endurance: A Year in Space, A Lifetime of Discovery (2017), page 365. With Margaret Lazarus Dean. Alfred A. Knopf, a division of Penguin Random House. ISBN 9781524731595.