Praising the process as yet another miracle of biology that modern medicine chooses to ignore, a gray-lipped Robert F. Kennedy Jr. spoke at a press conference Wednesday during which he touted the body’s natural ability to transmute lead into gold. “The human body is able to do some incredible things if you consume enough lead,” said the secretary of health and human services, noting that even a few drops of colloidal lead every morning could have an effect similar to that produced by the elixirs ancient Egyptians drank for rejuvenation.