Notebook

  1. Genetics

    Genes and environment balance each other

    Genes and environment have equal influence on human traits.

    By Tina Hesman Saey
  2. Astronomy

    Brightest galaxy discovered

    The brightest known galaxy is about 350 trillion times as bright as the sun, and a supermassive black hole is to blame.

    By Christopher Crockett
  3. Science & Society

    Here’s what game theory says about how to win in semifinals

    Game theory informs competitors facing off in a semifinal whether to go all out or save energy for the final.

    By Andrew Grant
  4. Genetics

    A billion years of evolution doesn’t change some genes

    Human genes can substitute for 47 percent of essential genes in baker’s yeast, new research shows.