John Pickrell

John Pickrell is a freelance writer based in Sydney. He was a science writing intern at Science News in 2002.

All Stories by John Pickrell

  1. Health & Medicine

    Less Crying in the Kitchen: Tasty, tearfree onions on the horizon

    The discovery of a new enzyme responsible for creating the tear-inducing chemicals found in onions may herald the arrival of genetically modified tearfree onions.

  2. Earth

    Lawn Agent Cues Embryo Shortfall: Herbicide weeds out mice in the womb

    Minuscule amounts of over-the-counter weed killers impair reproduction in mice.

  3. Health & Medicine

    Iron Cooking Pots Help Combat Malnutrition

  4. Health & Medicine

    Another Polio? Alarming West Nile fever risks emerge

    Medical workers have found poliolike symptoms in a few victims of West Nile fever, and federal officials noted that blood transfusions appear to have infected some people.

  5. Earth

    Cancer Causer? Researchers zero in on leukemia risks

    Researchers add to mounting evidence that household pesticide exposure may be a significant risk factor for childhood leukemia.

  6. Humans

    Small Steps: World Summit delegates wrangle over eco-friendly future

    Twenty thousand delegates from around the world met in Johannesburg last week for a contentious World Summit on Sustainable Development.

  7. Health & Medicine

    Arctic Sneeze: Greenlanders’ allergies are increasing

    Allergies in Greenland nearly doubled from 1987 to 1998.

  8. Earth

    Uncertainty returns over sex-change fish

    Scientists question whether a potentially gender-bending hormone found in polluted Florida streams is responsible for masculinized female fish.

  9. Health & Medicine

    Pet exposure may reduce allergies

    Exposing children to cats or dogs at an early age may make them less prone to allergies later in life.

  10. Animals

    What’s the Mane Point? Foes and females both have role

    The condition of a lion's mane apparently advertises high-quality mates to picky females and wards off male adversaries.

  11. Earth

    Killer Cocktails: Drug mixes threaten aquatic ecosystems

    Trace amounts of pharmaceutical drugs in waterways may work together to deform and kill native microscopic organisms.

  12. Materials Science

    Gems of War

    While international bodies grapple with regulatory schemes to stem the diamond trade that funds ongoing civil conflicts in African countries, scientists are attempting to develop methods for identifying gems from conflict zones.