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  1. Health & Medicine

    Amphetamine abusers face blood vessel risk

    The odds of sustaining aorta damage are more than tripled in people who abuse or are dependent on amphetamines, a review of hospital records finds.

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  2. Space

    Solar system older than estimated

    A meteorite’s age has pushed back the estimated time of the solar system’s formation by almost 2 million years.

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  3. Life

    ‘Whispering’ gives bats the drop on prey

    A stealth approach to echolocation appears to be adaptive for catching eared moths.

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  4. Computing

    Going viral takes a posse, not an army

    Quality of followers, not quantity, determines which tweets will fly

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  5. Earth

    Most BP oil still pollutes the Gulf, scientists conclude

    Below the surface, plumes of oil are proving slow to disperse and break down.