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  1. Planetary Science

    A different view of Uranus’ rings

    The rings of Uranus are now tilted edge on to Earth, revealing small, inner rings made of fine dust.

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  2. Genome 2.0

    Detailed explorations of the human genome are showing that individual genes may have complex structures, and that much of what had been called junk DNA is not junk at all.

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  3. 19879

    Although multinational agreements on global warming try to spread the burden among all nations, data from the MILAGRO project in Mexico City suggest that the major responsibility for excess production of greenhouse gases and other pollutants lies with the megacities, which constitute a rather small number of culprits and ones that not all nations possess.