Scientists Find Blood Molecule That Attracts Wolves, Repels Humans Jamie White Posted on October 23, 2017 Posted in Aggregated No Comments The E2D molecule — said to give blood a metallic aroma — appears to be ‘in a class of its own,’ say scientists. Share this:Share Share on Facebook (Opens in new window) Facebook Share on Reddit (Opens in new window) Reddit Share on X (Opens in new window) X Share on LinkedIn (Opens in new window) LinkedIn Email a link to a friend (Opens in new window) Email