Until very recently, if you wanted to know more about a controversial scientific topic—stem cell research, the safety of nuclear energy, climate change—you probably did a Google search. Presented with multiple sources, you chose what to read, selecting which sites or authorities to trust.Until very recently, if you wanted to know more about a controversial scientific topic—stem cell research, the safety of nuclear energy, climate change—you probably did a Google search. Presented with multiple sources, you chose what to read, selecting which sites or authorities to trust.Internet[#item_full_content]