Every atom in our bodies was fused in an ancient star. NASA astronomer Dr. Michelle Thaller explains how the iron in our blood connects us to one of the most violent acts in the universe—a supernova explosion—and what the universe might look like when all the stars die out.



This video is a collaboration between The Atlantic and SoundVision Productions' The Really Big Questions. Listen to TRBQ's one-hour radio special "What is a Good Death?" distributed by Public Radio International.

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