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. Paleontology

    Early hunters are guilty as charged

    Scientists find that hunting is the likely cause of New Zealand's prehistoric bird extinctions rather than habitat destruction or pest introduction.

  2. Astronomy

    Telescope Tuned Up: Back to work for orbiting observatory

    A rejuvenated Hubble Space Telescope floated away from the space shuttle Columbia on March 9 after astronauts spent a week renovating the observatory.

  3. Copy Crab: DNA confirms that crab forms have several origins

    New genetic evidence suggests that crabs aren't all close relatives and their characteristic shape evolved independently on numerous occasions.

  4. Health & Medicine

    Vaccine Power: Immune cells target cancerous tissue

    Researchers are enlisting a person's own immune system to attack prostate tissue, including cancerous cells.

  5. Physics

    A new way to stick it to flies

    Researchers have measured the amount of static charge that a walking house fly generates.

  6. Ecosystems

    Genetic lynx: North American lynx make one huge family

    A new study of lynx in North America suggests the animals interbreed widely, sometimes with populations thousands of kilometers away.

  7. Humans

    Smallpox redux: World body suggests keeping the virus

    Fear of bioterrorism has led the World Health Organization to postpone its 2002 deadline for destruction of smallpox virus stocks so that scientists can refine current vaccines and improve defenses against the disease.