MICROBIAL NETWORKS

Scientists picked 25 female lab mice and watched how their stomach and gut bacteria changed after an infection with Helicobacter pylori—the same bug that causes most stomach ulcers and even cancer in humans. For one week the mice hosted the invader, then for another month they got powdered Weizmanni

You know how water can go from having lots of oxygen to none at all? This is called the aerobic-anoxic transition. During this switch, tiny pieces of dirt, called suspended sediment (SPS), can play a big role in how much nitrogen, specifically nitrate-nitrogen (NO3-N), stays in the water. NO3-N chan