Here I was this morning just thinking about this - weird how that happens. My wife got this gift recently, that at first looks like a snowglobe, but actually h

Here I was this morning just thinking about this - weird how that happens. My wife got this gift recently, that at first looks like a snowglobe, but actually has fine sand and seashells inside. You can kind of shake it or rotate it about, and the seashells that "rise" to the top on the sand change as you do it. For some reason, that got me thinking about this topic. Then I see it on HN...