Henry Spencer quote ✍️

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Sometimes people wonder why aeroplanes are so cheap and rockets are so expensive. Even the most superficial comparison shows one obvious difference: aeroplane engines use outside air to burn their fuel, while rockets have to carry their own oxidisers along.
Henry Spencer people wonder why

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WHY 130 clues
PEOPLE 122 clues
WORLD 117 clues
WONDER 68 clues
REASONS 40 clues
RELIGIONS 1 clue
Often perfumed powder
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Hint 1 meaning
A soft mineral of a soapy feel and a greenish, whitish, or grayish color, usually occurring in foliated masses. It is hydrous silicate of magnesia. Steatite, or soapstone, is a compact granular variety.
Hint 2 anagram
CATL
Hint 3 another clue
BABY DOCTOR FOR SHORT
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