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  1. Life

    Here are 8 remarkable scientific firsts of 2024

    Making panda stem cells, mapping a fruit fly’s brain and witnessing a black hole wake up were among the biggest achievements of the year.

    By Sophie Hartley
  2. Neuroscience

    The message-sending part of neurons may be blobby, not smooth

    Axons can be shaped like strings of pearls, research in mice and people show. How that shape may influence brain signaling is not yet clear.

    By Laura Sanders
  3. Anthropology

    Britain’s largest ancient massacre may have included cannibalism

    Bones recovered from a natural shaft unveil a 4,000-year-old massacre of men, women and children, possibly part of a cycle of revenge killings.

    By Bruce Bower
  4. Space

    These discoveries in 2024 could be groundbreaking — if they’re true

    Did microbes ever live on Mars? Did an "elevator" help build Egypt’s first pyramid? Some signs pointed to yes this year, but confirmation is still needed.