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  1. Astronomy

    Cosmic Revelations: Satellite homes in on the infant universe

    A new portrait of the infant universe pins down the age of the universe—13.7 billion years—to an unprecedented accuracy of 1 percent, provides new evidence that the universe began with a brief but humongous growth spurt, and reveals that it already contained a plethora of stars when it was just 200 million years old.

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  2. Gene found key to brain chemical

    The mammalian brain makes the neurotransmitter serotonin in an unexpected way.

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  3. Health & Medicine

    Worms offer the skinny on fat genes

    The identification of worm genes that regulate fat storage may provide insight into human obesity.