I heard that story on NPR too. I expect Roundup resistant horseweed to be making an appearance in my neck of the woods, Cumberland County Il., soon as the topography of rolling hills dictates the use of no-till methods that use roundup. As Ean Malcom in Jurassic Park stated, “nature will find a way”. A half century of use of chemicals and antibiotics is already stimulating the adaptation by organisms to our meddling.