by Joe Palca
Aug 21, 2013 (All Things Considered) — Late summer tends to be a slow month for news. But at All Things Considered, we put on a two hour program, no matter what. So -- without a trace of irony -- one of our science correspondents offered to help fill some holes in the show with a series of stories about holes. Today, he explores the complex philosophical question, what is a hole? And when is a hole not a hole?
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