Uncategorized

  1. Planetary Science

    A meteor may have exploded over Antarctica 430,000 years ago

    Tiny spherules recovered from a mountaintop suggest a space rock broke apart midflight and sprayed debris across thousands of kilometers.

    By Sid Perkins
  2. Health & Medicine

    Frog skin cells turned themselves into living machines

    The “xenobots” can swim, navigate tubes, move particles into piles and even heal themselves after injury, a new study reports.

    By Laura Sanders
  3. Life

    These are the 5 costliest invasive species, causing billions in damages

    Invasive species have cost the global economy at least $1 trillion since 1970 and $162.7 billion in 2017 alone. The annual cost is increasing.

    By Jonathan Lambert
  4. Archaeology

    Stone Age culture bloomed inland, not just along Africa’s coasts

    Homo sapiens living more than 600 kilometers from the coast around 105,000 years ago collected crystals that may have had ritual meaning.