1. Earth

    Tomato compound repels mosquitos

    New insect repellents based on a compound that contributes to the smell of crushed tomato leaves are under development.

  2. Earth

    Teenage Holdup: Pollution may delay puberty

    A new study of adolescents suggests that widespread environmental pollutants such as PCBs and dioxins may delay sexual development.

  3. Agriculture

    Killer bees boost coffee yields

    Even self-pollinating coffee plants benefit substantially from visits by insect pollinators.

  4. Agriculture

    Slugging It Out with Caffeine

    Anyone who has raised tomatoes in a moist environment knows the tell-tale sign: Overnight, a ripe, juicy orb sustains a huge, oozing wound. If you arrive early, you might catch the dastardly culprit: a slug. In one test, scientists sprayed soil with dilute caffeine and then watched as slugs, like this one, made haste to […]

  5. Earth

    Pharm Pollution

    Antibiotics in sewage sludge and manure have the potential to poison plants or end up in food.

  6. Earth

    As globe warms, atmosphere keeps its cool

    Scientists confirm a confusing discrepancy between temperatures at Earth's surface and in its atmosphere.

  7. Earth

    The Importance of Being Electric

    By coordinating measurements from telescopes, planes, balloons, and a battery of instruments, terrestrial and space scientists have now placed themselves on almost intimate terms with sprites—luminous shapes that fleetingly appear high above lightning storms.

  8. Earth

    Famed undersea vent may be lost

    When scientists last month tried to revisit an undersea hydrothermal vent first discovered nearly a quarter of a century ago, they found the site desolate, possibly paved by a fresh volcanic eruption.

  9. Earth

    Mangled microfossils may mark impact sites

    Scientists studying sediment cores drilled in eastern Virginia say they’ve possibly identified a new clue to the locations of ancient, hidden impact craters: Just look for broken or twisted microbial fossils.

  10. Earth

    Presto, Change-o!

    Compared with the snail's-pace processes that normally shape Earth's surface, the impacts of extraterrestrial objects change our planet's geology in a flash.

  11. Agriculture

    Moos, microbes, and methane

    A feed additive could reduce methane emissions from cows.

  12. Environment

    Old thermometers pose new problems

    Though health groups advocate getting mercury thermometers out of the home, obtaining sound advice on how to dispose of the thermometers can be problematic.