CBS Correspondent Martha Teichner reports. For those who suffer from Alzheimer's disease, the latest strides in research may or may not be too late. Still, there are more reasons to be hopeful. There is an odd, fascinating beauty about them, these primitive, spiral-shaped forms we would never see at all if they were not magnified 50 to 60 thousand times. They are borrelia burgdorferi, the germs that cause Lyme disease.
Scientists are now able to alter the genetic make-up of plants and animals that people eat.
CBS Correspondent Rita Braver investigates the truth about biotech foods. And some men of science are taking it seriously. They weigh only one and a half pounds and can fit in the palm of your hand. In our Sunday Morning cover story, big ethical questions are raised over these tiny patients. CBS News Correspondent Elizabeth Kaledin reports.