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  1. Health & Medicine

    Herbal erection pills may be spiked

    Some pills marketed as herbal remedies for erectile dysfunction contain drugs that should be available only by prescription.

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  2. Earth

    Filtered air cuts down mutations

    Microscopic particles in the air may mutate the DNA of sperm.

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  3. Two egg cells make fatherless mouse

    By fusing two egg cells, researchers have created a mouse with no father.

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  4. Astronomy

    Windy endeavor

    In early April, an Earth-orbiting satellite closed its doors after more than 2 years of collecting ions from the solar wind.

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  5. Astronomy

    Dark Doings

    A slew of new and proposed experiments, ranging from the cosmic to the subatomic scale, may shed light on why the expansion of the universe is speeding up.