Development

  1. Health & Medicine

    A new study challenges the idea that the placenta has a microbiome

    A large study of more than 500 women finds little evidence of microbes in the placenta, contrary to previous reports on the placental microbiome.

    By Laura Sanders
  2. Humans

    Medicaid expansion may help shrink health gaps between black and white babies

    States that expanded Medicaid as part of the Affordable Care Act shrunk racial disparities between black and white infants, a new study shows.

    By Sujata Gupta
  3. Science & Society

    The learning gap between rich and poor students hasn’t changed in decades

    The educational achievement gap between the poorest and richest U.S. students remains as wide as it was almost 50 years ago.