This image has been going around the intertubes recently, I saw it first on Planet 3.0 and again on APOD. It is one of those interesting illustrations of large quantities that seems surprising or anti-intuitive either because you never thought about it carefully before or just because it is hard to get your head around sizes that are so far outside the realm of everyday experience.
Anyway, I am posting it because my wife insisted (a very unusual turn of events, considering the usual frown upon spending my non-work time on the computer!). When she saw it she became quite alarmed and thought…
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