Learn about Gravity
Learn more about general relativity, Isaac Newton  and Albert Einstein
 with this fascinating gravity video. As the story goes,  back in 1665 
Isaac Newton observed an apple fall from a tree and from there  began to
 understand gravity and how it worked to keep the moon in earth’s orbit 
 as well as keep humans and various other objects attached to the 
ground. Newton’s theories of  gravity were revolutionary at the time but
 weren’t perfect, it took nearly 250  years before these issues were 
addressed. Along came Albert Einstein, who realized  that there was in 
essence a universal speed limit, the speed of light. That nothing  could
 go faster than this contradicted Newton’s theories and so evolved  
Einstein’s theory of general relativity. Check out this amazing gravity 
video  clip and see for yourself how it all works.
 
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