Cancer is the uncontrolled reproduction of cells in the body and the cells form a hard lump or tumor, which can then spread into other areas of the body. The exact reason why the cells do this is unknown; it is not understood why the cells are not receptive to the normal signal to stop reproducing. <a href="https://www.yourhealthandtechfriend.org/nancykgurish/alph008-000-000-010.php"><i>... more about this topic ...</i></a><br><br>A <i>five star</i book</i> to understand cancer: <a href="https://amzn.to/3Xjni7C">The Cancer Code</a>, by Dr. Jason Fung!<br><br>