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Wheel momentum Walter Lewin.
It's like they say - common sense is what tells you the earth is flat.
Forks Over Knives -The Movie That Changed The Way I Eat
The vegan and paleo crowds haven't clashed yet, but boy, is it going to be intense when they do. Proponents of both diets claim similar benefits, but with drastically different approaches...
Vatican City Explained - CGPGrey
So... Vatican city is kind of like the corporate nation-states in Snow Crash, presumably complete with franchulates.
How It's Made Baseballs
That was a lot more complex than I expected! But no mention of where they're made... Not in North America for sure.
World's Roundest Object! Redefining The Kilogram
(the length of the path travelled by light in vacuum during a time interval of 1/299,792,458 of a second)^3 * 10^-3!
Interesting. But then how do you accurately measure a litre of water?