Alex Chadwick talks Ira Flatow, host of NPR's Talk of the Nation Science Friday, about new examinations of the theories of Galileo and Isaac Newton relating to gravity. This is DAY TO DAY. I'm Alex ...
Thirty-five years after Moon-walking astronauts placed special reflectors on the lunar surface, scientists have used these devices to test Albert Einstein’s general theory of relativity to ...
Physicists studying Leonardo da Vinci’s Codex Arundel have made the remarkable discovery that the Italian Renaissance man may have beaten Galileo and Isaac Newton to theorizing gravity. Leonardo’s ...
Biological timekeeping : the body's rhythms -- Calendar : different drummers -- Early clocks : home-made beats -- The pendulum clock : the beat of nature -- Successors : ubiquitous timekeeping -- ...
Smithsonian American Art Museum, 2006. Smithsonian American Art Museum 8th & G Streets, N.W Washington District of Columbia 20560 Accession Number: 1966.103.13 ...
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