20th and 21st Century Technological Inventions
Miyerkules, Hunyo 17, 2015
The nail, second millennium b.c.
“Extended lives by enabling people to have shelter.” —
Leslie Berlin
Colben Mae L. Solomon
http://www.theatlantic.com/magazine/archive/2013/11/innovations-list/309536/#sthash.H3HjsaJ4.dpuf
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