Earth and Human Activity

  1. Animals

    Nighttime lights can dim a firefly’s flash

    Fireflies blink to attract mates. But when it’s too bright at night, the insects may stay away.

    By
  2. Environment

    Plastic trash rides ocean currents to the Arctic

    Ocean currents can carry plastic trash far from the cities that shed it. Some plastic debris has made it all of the way to the Arctic Ocean, new data show.

    By
  3. Environment

    Some food-packaging pollutants mess with the thyroid

    Chemical pollutants may hurt the ability of the thyroid gland to make an important hormone. Teens may be most at risk.

    By
  4. Life

    Cities drive animals and plants to evolve

    Biologists are finding that some species have used genetic changes to evolve — adapt — to the pollution and other stressors that they encounter in cities.

    By
  5. Ecosystems

    America’s duck lands: These ‘potholes’ are under threat

    North America’s prairies are in trouble. Scientists race against the clock for clues about how to save the plants — and animals — that call it home.

    By
  6. Environment

    Did your burger come with a side of non-degrading pollutants?

    Perfluorinated compounds pollute the environment and might harm human health. A new study shows that one place they often show up is the paper and cardboard used to package fast foods.

    By
  7. Earth

    Keeping space missions from infecting Earth and other worlds

    Scientists are always looking for ways to stop Earthly microbes from polluting other planets. The same goes for bringing bits of other planets back to Earth.

    By
  8. Oceans

    Deep-sea dump: Trash is collecting on the Arctic seafloor

    Trash is building up on the bottom of the Arctic Ocean, including plastic bags, glass shards and fishing nets.

    By
  9. Archaeology

    Silk Road’s origins may date back millennia

    The mountain treks of ancient herders helped mold a cross-continent trade network known as the Silk Road.

    By
  10. Environment

    Cleaning up water that bees like to drink

    Plant roots suck up pesticides used on soils, then release them into water that can seep from their leaves. This is a sweetened water that bees love to sip. A teen figured out how to remove most of the pesticide with bits of charcoal.

    By
  11. Space

    Student programs computer to predict path of space trash

    People are already using space as a garbage dump, which could prove dangerous to future space travelers. A teen set out to track space junk using only her home computer.

    By
  12. Agriculture

    Teen converts water pollutant into a plant fertilizer

    Too much phosphate can fuel algal growth, which can rob oxygen from the water. This can suffocate fish and other wildlife. Stefan Wan found a way to collect that pollutant, which can later be used as a farm nutrient.

    By