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. mammal skulls
    Life

    Remarkable fossils capture mammals’ recovery after the dino-killing asteroid

    A fossil-rich site in Colorado is revealing how mammals rebounded and flourished after an asteroid strike 66 million years ago.

  2. saber-toothed cat skulls
    Paleontology

    Fossils reveal saber-toothed cats may have pierced rivals’ skulls

    Two Smilodon fossil skulls from Argentina have puncture holes likely left by the teeth of rival cats.

  3. Mussaurus patagonicus
    Paleontology

    This early sauropod went from walking on four legs to two as it grew

    A new computer analysis shows how Mussaurus patagonicus' center of gravity changed as the dinosaur grew.

  4. Smilodon hunting
    Paleontology

    Saber-toothed cats were fierce and family-oriented

    New details shift the debate on whether Smilodon lived and hunted in packs, and answer questions about other behaviors and abilities.

  5. Health & Medicine

    Federal Government Launches Organic Standards

  6. Earth

    Air-Pollution Pileup: Mediterranean endures emissions from afar

    Although most Mediterranean countries aren't big polluters, the area is a crossroads for pollution-carrying air currents from Europe, Asia, and North America.

  7. 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.

  8. 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.

  9. Health & Medicine

    Iron Cooking Pots Help Combat Malnutrition

  10. 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.

  11. 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.

  12. 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.