• Preemies from the Precambrian
    Scientists are using a miniaturized version of the medical CT scanner to look for clues to evolution in the fossilized embryos of some of Earth's earliest animals.
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  • The Rise of Oxygen
    When one looks back on our planet from space, an intriguing finding centers on its apparent biochemical contradictions: Earth has lots of chlorophyl and thus plants, but also has lots of oxygen, which is a poisonous element or vegetative waste product.
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  • Weird Life on the Mats
    The fossil record is full of animals with bizarre body shapes. Do these extinct species represent failed evolutionary experiments, or were they simply well-adapted to an environment that no longer exists?
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  • Europa: Chewy or Crunchy?
    For geophysicist William B. Moore, the question of whether life exists on Jupiter's moon Europa boils down to whether the moon's center is chewy or crunchy.
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  • Looking for Carbonates in Dry Places
    A research team claims it has found carbonates in dust around two dying stars, where water cannot exist. If the finding is confirmed, astronomers may have to re-think some assumptions about the presence of water during the formation of our own solar system. But both
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  • Weird Life on the Mats
    Do extinct species represent failed evolutionary experiments? At least for some more closely related to today's crabs and lobsters, University of Southern California scientist David Bottjer says that if many such early animals look strange to us, it is not because they were strange.
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  • The Search for Distant Earths
    Imagine trying to see an ant crawling across the headlight of a car miles away. That is the magnitude of the task facing astronomers as they search for small, rocky Earth-like planets around other stars - planets that might harbor life
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  • Europa: Chewy or Crunchy?
    For geophysicist William B. Moore, the question of whether life exists on Jupiter's moon Europa boils down to whether the moon's center is chewy or crunchy.
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  • Cafe Methane
    In recent years, researchers discovered life also thrives in other, much colder, lightless deep-sea ecosystems besides hydrothermal vents.
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  • The Meaning of Life
    Sitting beneath a dark night sky, looking up at the vast array of stars, what human has not wondered, "Are we alone?"
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  • Café Methane
    In recent years, researchers discovered life also thrives in other, much colder, lightless deep-sea ecosystems besides hydrothermal vents.
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  • The Meaning of Life
    Sitting beneath a dark night sky, looking up at the vast array of stars, what human has not wondered, "Are we alone?
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  • Life’s Chemical Fingerprints
    Using a technique called Raman spectroscopy, researchers are developing instruments that may one day search for life on Mars, Europa, or Callisto.
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