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  1. Anthropology

    Human brains rounded into shape over 200,000 years or more

    Ancient humans’ brains slowly but surely became round, scientists say.

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  2. Science & Society

    Memory remains elusive, but the search continues

    Acting Editor in Chief Elizabeth Quill explores the history of memory and scientists' search for its physical trace in our brains.

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  3. Cosmology

    Readers wonder about the universe’s expansion and more

    Readers had questions about the universe's accelerating expansion, a hidden void in the Great Pyramid of Giza and what happens to human waste in space.

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  4. Genetics

    Baby macaques are the first primates to be cloned like Dolly the Sheep

    Scientists have cloned two baby macaque monkeys with the same technique used to clone Dolly.