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  1. Health & Medicine

    Chemicals in marijuana may affect women’s fertility

    THC in marijuana may help eggs become ready for fertilization. But this may come at the cost of more eggs with wrong numbers of chromosomes.

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  2. Planetary Science

    Seismic waves suggest Mars has a solid heart

    NASA’s InSight lander listened to Marsquakes for four years. The tremors revealed that Mars may have a solid inner core.

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  3. Particle Physics

    This laser would shoot beams of neutrinos, not light

    The subatomic particles called neutrinos are famously elusive. But an unconventional trick could make a laser beam of the aloof particles.

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  4. Neuroscience

    Your red is my red, at least to our brains

    Despite philosophical debates, colors like red may spark similar brain activity across individuals, new research suggests.