Why don't we get cancer all the time?

The seemingly inefficient way our bodies replace worn-out cells is a defense against cancer, according to new research.

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<p><a href="http://www.physorg.com/news117291917.html">Why don't we get cancer all the time?</a></p> <p>The seemingly inefficient way our bodies replace worn-out cells is a defense against cancer, according to new research.</p>