Construct an argument supported by empirical evidence that changes to physical or biological components of an ecosystem affect populations.

  1. Science stars are on display at the White House

    One hundred students from 30 states participated in the fourth annual White House Science Fair in Washington, D.C.

  2. Plants

    Taking a long look at lichen

    Lichens may not look like much, but they play a vital role in our ecosystems. ISEF finalist Madeline Handley decided learn more about the lichens in her native Alaska.

  3. Animals

    These insects thirst for tears

    In some parts of the world, insects will drop by for a savory beverage. Interestingly, neither a croc — nor a scientist who offered his eyes up to ‘tear-sipping’ bees — seemed bothered much by the freeloaders.

  4. Animals

    Sea otters picked up swine flu

    A new study finds that large numbers of sea otters off of the U.S. Pacific coast have been exposed to the ‘pandemic’ type of this killer virus.

  5. Animals

    When a species can’t stand the heat

    When temperatures rise, New Zealand’s tuatara produce more males. With global warming, that could leave the ancient reptile species with too few females to avoid going extinct.

  6. Animals

    Explainer: How invasive species ratted out the tuatara

    The introduction of rats to New Zealand led to huge population losses of the ancient tuatara. These uncommon reptiles vanished from the mainland. This left isolated populations to survive on several dozen isolated islands.

  7. Animals

    Quieter vibes for city spiders

    How much a web vibrates affects how well a spider senses when that web has captured prey. But webs attached to concrete, plastic and other artificial materials vibrate less than do those built on natural materials, such as twigs or leaves.

  8. Environment

    Burning to learn

    Fires cause billions of dollars of destruction to homes and forests every year. But not all fires are bad, especially for forests. With a better understanding of fire, scientists can both help people prevent dangerous fires — and identify which ones it would be better to let burn.

  9. Environment

    Explainer: How and why fires burn

    A fire’s colorful flame results from a chemical reaction known as combustion.

  10. Health & Medicine

    Intel STS finalist finds new flu fighters

    Intel Science Talent Search finalist Eric Chen used a computer simulation to narrow down chemical targets to fight influenza. The drugs that he identified could be the next big weapons against flu.

  11. Microbes

    Arctic thaw is spreading wildlife diseases

    Polar animals are encountering new, killer parasites as melting ice unlocks their access to new hosts.

  12. Animals

    First living fish leaves ‘endangered’ list

    Twenty-one years ago, a minnow facing a high risk of extinction was placed on the U.S. Endangered Species List. With help from scientists, the fish appears to have largely recovered. It’s the first ‘listed’ fish to do so.