Construct an explanation that predicts patterns of interactions among organisms across multiple ecosystems.

  1. Health & Medicine

    Ebola emerges in the Congo

    The Democratic Republic of Congo (formerly Zaire) is where the Ebola virus was first discovered in 1976. This nation has just been hit again by the disease. Scientists suspect this is a new and independent outbreak — not a spread of the epidemic ravaging West Africa.

  2. Health & Medicine

    Ebola treatments and vaccines could be near

    Using experimental medicines against Ebola might help to slow or end an outbreak in Africa that has defied efforts to control it.

  3. Health & Medicine

    Explainer: What is Ebola?

    A virus is behind the hemorrhage-inducing infection called Ebola. It causes fevers and often intense bleeding — seemingly from anywhere and everywhere.

  4. Animals

    Germs explain some animal behaviors

    The bacteria that people and other animals host in and on their bodies are invisible to the eye. Yet they can play a very visible role in behavior. It’s something scientists are just coming to appreciate.

  5. Environment

    Bug-killer linked to decline in birds

    One of the most popular chemicals used to protect crops from bugs may also take a toll on birds, a Dutch study finds. U.S. farmers also rely on these insecticides, a second study finds.

  6. Animals

    Bugs may have made us brainy

    Finding and eating bugs when other food was scarce helped primates — including our ancestors — evolve bigger and better brains. At least that’s the conclusion of a new study in Costa Rica.

  7. Microbes

    The war on superbugs

    Doctors and scientists are exploring ways to stem the growing global crisis of antibacterial resistance.

  8. Microbes

    Explainer: What you can do to fight antibiotic resistance

    Doctors and scientists are not the only people who can help preserve the effectiveness of life-saving antibiotics. Even patients have a role to play, as these tips show.

  9. Microbes

    Superbugs: A silent health emergency

    Have antibiotics become too popular? Overusing these medicines fuels resistant germs that pose a global health threat.

  10. Animals

    Stalking squirrels for science

    A scientist noticed the squirrels in his family’s town, and began studying them. His results show why squirrels are such good city dwellers, and prove that science is right outside your door.

  11. Animals

    A library of tweets (and howls and grunts)

    The Macaulay Library houses a world of animal sounds. And now anyone with an Internet connection can check out this audio collection.

  12. Microbes

    Convincing bacteria they’re alone

    Caffeine may be the trick to confusing some bacteria into thinking they’ve not yet summoned enough troops to launch a successful attack on their host. It could prove an alternative to antibiotics for certain infections.