NASM copy 39088008693905 has bookplate: Gift of Melvin Buchner. NASM copy 39088016868143 has Smithsonian Institution Libraries bookplate: Gift of Leonard J. Raymond. Contents Ch. 1. Evolution of the ...
In the 1480s, Italian Renaissance artist and inventor Leonardo da Vinci came up with an ingenious design for an “aerial screw.” A rotor in the shape of a helix measuring about 13 feet in diameter, the ...
Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...
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