Uncategorized

  1. Physics

    100 years ago, an eclipse proved Einstein right. Today, black holes do too — for now

    In 1919, an eclipse affirmed Einstein’s famous general theory of relativity. Now scientists hope to use black holes to poke holes in that idea.

    By Lisa Grossman
  2. Animals

    A 50-million-year-old fossil captures a swimming school of fish

    Analysis of a fossilized fish shoal suggests that animals may have evolved coordinated group movement around 50 million years ago.

    By Carolyn Wilke
  3. Health & Medicine

    One number can help explain why measles is so contagious

    The basic reproduction number, or "R naught," of measles shows how contagious the disease is compared with other pathogens.