360 by zem | 132 comments on Hacker News.
New best story on Hacker News: If the heart is a muscle, why doesn't it ever get tired?
If the heart is a muscle, why doesn't it ever get tired?
360 by zem | 132 comments on Hacker News.
![librobucher]()
360 by zem | 132 comments on Hacker News.
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