Re: So what does Cholesterol do in the body that's so important the genes are unchanged in
It's essential for the cells' lipidic membranes properties, including mechanical but also signal sensing and transducing -receptors and "transducers" organisation- and ion exchanges (channels regulation), basically the cell's "life support" systems. So, yeah, pretty darn important.
On an unrelated note, claiming that "many of" ancient species -or even groups- still live today as the article does is a gross misunderstanding. At best you could claim that many groups still have living representants.