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  1. Life

    Video reveals that springtails are tiny acrobats

    Poppy seed–sized cousins of insects, famed for wild escape leaping, right themselves in mid-falls faster than cats.

    By Susan Milius
  2. Earth

    Catastrophic solar storms may not explain shadows of radiation in trees

    Tree rings record six known Miyake events — spikes in global radiation levels in the past. The sun, as long presumed, might not be the sole culprit.

    By Nikk Ogasa
  3. Astronomy

    Part of a lost, ancient star catalog has now been found

    Greek astronomer Hipparchus may be the first to try to precisely map the stars. His lost work turned up on parchment that had been erased and reused.