HS-LS4-5

Evaluate the evidence supporting claims that changes in environmental conditions may result in: (1) increases in the number of individuals of some species, (2) the emergence of new species over time, and (3) the extinction of other species.

More Stories in HS-LS4-5

  1. Genetics

    What would it take to make a unicorn?

    Onward’s dumpster-diving unicorns seem like an impossibility. But scientists have some ideas about how unicorns could become real.

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  2. Health & Medicine

    Search speeds up for vaccine against the new coronavirus

    Scientists are investigating unusual ways to make drugs to prevent viral infections. One may even be able to treat already sick people.

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  3. Health & Medicine

    Immune arms-race in bats may make their viruses deadly to people

    An overactive immune system may help bats avoid being sickened by many viruses. This may viruses becoming stronger — and deadlier — when they hit other species.

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  4. Health & Medicine

    Your most urgent questions about the new coronavirus

    Researchers have more questions than answers right now about 2019-nCoV. They’re racing to understand and stop the coronavirus and the health crisis it poses.

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  5. Environment

    Australian fires have imperiled up to 100 species

    As massive wildfires consume huge swaths of Australia’s bush, untold species — many of them found nowhere else — are now threatened with extinction.

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  6. Microbes

    Drug-resistant germs kill some 35,000 Americans each year

    The new mortality rate may be way low, some experts say. Also troubling are two new germs that have emerged as big and urgent threats.

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  7. Life

    How a moth went to the dark side

    Peppered moths and some butterflies are icons of evolution. Now scientists have found a gene responsible for making them so.

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