1. Genetics

    Scientists Say: Chromosome

    This threadlike structure is made of DNA wrapped around protein. It allows the 3 billion base pairs in human DNA to stay neatly packaged in a cell.

  2. Life

    Cities drive animals and plants to evolve

    Biologists are finding that some species have used genetic changes to evolve — adapt — to the pollution and other stressors that they encounter in cities.

  3. Genetics

    How to view tiny parts of DNA? Make them ‘blink’

    A new technique can image nanoscale structures in cells without hurting them. No dyes needed. All you have to do is stimulate them with the right color of light.

  4. Life

    How to make a ‘three-parent’ baby

    Scientists combined an egg, sperm and some donor DNA: The end result: what appears to be healthy babies.

  5. Genetics

    Explainer: How PCR works

    The polymerase chain reaction, or PCR, is like a DNA-copying machine. It duplicates genetic material over and over. Here’s how.

  6. Genetics

    Scientists find genes that make some kids’ hair uncombable

    Scientists have pinpointed three genes that cause ‘uncombable hair syndrome’ in some kids.

  7. Genetics

    World’s tallest corn towers nearly 14 meters

    Short nights and a genetic tweak helped novel corn reach record heights.

  8. Genetics

    Scientists Say: eDNA

    Animals may escape traps or nets, but they often leave DNA behind in their environment, giving scientists important clues.

  9. Microbes

    New date for U.S. arrival of the AIDS virus

    A new study shows that HIV started circulating at least a decade earlier than previously realized.

  10. Genetics

    Human DNA carries hints of unknown extinct ancestor

    A new study suggests people today carry genetic traces of now-extinct species unknown to science.

  11. Plants

    Young sunflowers keep time

    The plants don’t just use light to follow the sun. An internal clock helps their stems bend as the sun moves across the sky.

  12. Genetics

    Explainer: What is epigenetics?

    Epigenetics is the study of molecular “switches” that turn genes on and off. Tweak those switches and there could be big health consequences.