Don't ever underestimate the threat of dengue. The mosquito-borne viral disease known as breakbone fever, is three times more prevalent than originally thought, according to a research paper published today in Nature and co-authored by dengue expert Thomas Scott of UC Davis.
Most people have never seen the walnut twig beetle, a tiny insect that spreads a fungal pathogen that kills walnut trees. No wonder. The insect, measuring about 1.5 millimeters long, is much smaller than a grain of rice.
