Christen Brownlee

All Stories by Christen Brownlee

  1. Health & Medicine

    The Beef about UTIs

    Antibiotic-resistant infections that affect some women may have been contracted from infected meat.

  2. Health & Medicine

    Not to Your Health: New mechanism proposed for alcohol-related tumors

    New findings suggest that alcohol encourages blood vessels to invade tumors, supplying nutrients that promote tumor growth.

  3. Health & Medicine

    Antibiotics could save nerves

    Penicillin and its family of related antibiotics may prevent the type of nerve damage that occurs in people with amyotrophic lateral sclerosis (ALS) and other diseases.

  4. Health & Medicine

    Male contraceptive shows promise in monkeys

    A shot that primes the immune system against a sperm protein might be the next male contraceptive.

  5. Kibble for Thought: Dog diversity prompts new evolution theory

    A genetic mutation that researchers have examined in several dog breeds may drive evolution in many other species.

  6. Growing where they haven’t grown before

    Researchers have found the right laboratory conditions for growing mouse precursor cells into sperm.

  7. Cloning Milestone: Monkey embryos urged to stem cell stage

    Researchers have coaxed cloned rhesus macaque embryos to grow to the blastocyst stage, the furthest point yet reached in cloning a nonhuman primate.

  8. Mice smell a mate’s immune system

    By sniffing molecules present in urine, mice gain insight into each other's immune systems.

  9. Stressed to Death: Mental tension ages cells

    Prolonged stress can cause cells to age faster than normal.

  10. Clock genes regulate blood sugar

    Circadian-clock genes may play an important role in governing the body's metabolism of dietary sugars and fats.

  11. DNA Bar Codes

    Scientists are using a small piece of DNA as a molecular bar code, a unique identifier to separate organisms into species.

  12. Seminal Discovery: Promiscuous females speed sperm evolution

    A gene responsible for semen viscosity has evolved more rapidly in primate species with promiscuous females than in monogamous species.