Uncategorized

  1. Planetary Science

    Mercury has a massive solid inner core

    The distribution of Mercury’s mass and small stutters in the planet’s spin suggest it has a giant solid inner core.

    By Carolyn Gramling
  2. Archaeology

    Ancient sculptors made magnetic figures from rocks struck by lightning

    Carved ‘potbelly’ stone sculptures suggest people in what’s now Guatemala knew about magnetism more than 2,000 years ago.

    By Bruce Bower
  3. Physics

    The M87 black hole image showed the best way to measure black hole masses

    The first image of M87’s black hole suggests it is 6.5 billion times the mass of the sun — close to what was expected based on how stars move around it.